Review for Final and Second Quarter Benchmark

Size: px
Start display at page:

Download "Review for Final and Second Quarter Benchmark"

Transcription

1 Review for Final and Second Quarter Benchmark Balance the following Reactions 1. 4Al + 3O 2 2Al 2 O Ca + N 2 Ca 3 N 2 3. Mg + 2AgNO 3 2Ag + Mg(NO 3 ) Al + 3CuCl 2 2AlCl 3 + 3Cu 5. What is the coefficient in front of C when this equation is balanced correctly? 12 C 12 H 22 O 11(s) 12C (s) + 11H 2 O (l) 6. What is the coefficient in front of NaCl when this equation is balanced correctly? 1 AgNO 3(aq) + NaCl (aq) NaNO 3(aq) + AgCl (s) 7. What is the coefficient in front of O 2 when this equation is balanced correctly? 13 2C 4 H O 2(g) 8CO H 2 O (l) 8. What is the coefficient in front of H 2 when this equation is balanced correctly? 3 N 2(g) + 3H 2(g) 2NH 3(g) 9. What is the coefficient in front of H 2 O when this equation is balanced correctly? 3 2Fe (s) + 3H 2 O (g) Fe 2 O 3 + 3H What is the coefficient in front of Ga 2 O 3 when this equation is balanced correctly? 1 Ga 2 O 3 + 3H 2 O 2Ga(OH) What is the coefficient in front of Ca(OH) 2 when this equation is balanced correctly? 3 2H 3 PO 4 + 3Ca(OH) 2 Ca 3 (PO 4 ) 2 + 6H 2 O Moles 12. What element is the mass system based on? Carbon What is the mass of one of Carbon-14? 14 grams 14. How many atoms are in 1 of Carbon-12? 15. How many cules are in 1 of Oxygen (O 2 )? 16. What is a? The number of atoms, or cules in 12 grams of Carbon A is a measurement of what? The number of particles 18. One of Nitrogen-14 has how many atoms? 19. One of Nitrogen-14 has how many grams? 14 grams 20. What do you call 6.02 x of anything? A 21. One of Nitrogen, Oxygen and Chlorine all have the same number of what? Atoms

2 Moles to Particles 22. If you have 3.00 s of NaCl how many cules are there? 3.00 s x cules = 1.806x10 24 cules 23. How many cules are in 6.00 s of H 2 O? 6.00s x cules = 3.612x10 24 cules 24. How many atoms are 4.00 s of Fluorine? 4.00s x atoms = 2.408x10 24 atoms 25. How many cules are in 7.00 s of AlCl 3? 7.00s x cules = 4.214x10 24 cules 26. How many atoms are in 7.00 s of P 4? ( 1 of P 4 has four atoms) 7.00s x 4 s of atoms x atoms = x10 25 atoms 1 Particles to s 27. How many s are in x10 24 particles of Cl? 1.806x10 24 x 1 = 3 s 28. How many s are in 3.01 x10 23 cules of H 2 O? 3.01x10 23 x 1 = 0.5 s 29. How many s are in x10 23 cules of NH 3? 1.505x10 23 x 1 = 0.25 s 30. How many s are in x10 24 cules of FeBr 2? 2.408x10 24 x 1 = 4 s 31. How many s are in x10 24 atoms of P 4? ( 1 cule of P 4 has four atoms this problem has 2 steps) 4.816x10 24 atoms x 1 x 1 cule = 2 s atoms 4 atoms Moles to Grams 32. How many grams are 6.50 s of CaCl 2? 650 s x g = g 1 CaCl How many grams are 20.0 s of C 6 H 14? 20.0 s x 86g = 1720 g 1 C 6 H How many grams are 0.05 s of LiF? 0.05 s x g = g 1 LiF 35. How many grams are 2.50 s of H 3 BO 3? 0.05 s x 61.81g = g 1s H 3 BO 3 Grams to Moles 36. How many s are 32 grams of O 2? 32g x 1 = 1 32g 37. How many s are 48 grams of CH 4? 48g x 1 = 3 s 16g

3 38. How many s are grams of H 2 SO 4? 490.5g x 1 = 5 s How many s are 8.8 grams of CO 2? 8.8g x 1 = 0.2 s 44.0g Moles to Liters 40. How many liters are 7.5 s of SO 3 at STP? 7.5 x = 168 L 41. How many liters are 1.25 s of NiCl 3 at STP? 1.25 x = 28 L 42. How many liters are 3.00 s of KIO 3 at STP? 3.00 x = 67.2 L 43. How many liters are s of Br 2 at STP? x = 2.8 L Liters to Moles 44. How many s are 44.8 Liters of CO 2 at STP? 44.8 L x 1 = 2.0 s 45. How many s are 11.2 Liters of He at STP? 11.2 L x 1 = 0.5 s 46. How many s are 112 Liters of I 2 at STP? 112 L x 1 = 5 s 47. How many s are Liters of MgO at STP? L x 1 = 7 s Multi step calculations 48. How many cules are 55.8 grams of MgO? (2 steps question) 55.8 L x 1 MgO = 1.38 s g 1.38 s x = 8.33 x cules 49. How many cules are 64 grams of O 2? 64 x 1 = 2 s 32 g 2 s x = x cules 50. What is the mass in grams of 3.01 x atoms of Ag? 3.01x10 24 x 1 = 5 s 6.02 x g 5 s x 107.9g = g

4 51. What is the mass in grams of x atoms of Au? 7.224x10 24 x 1 Au = 12 s 6.02 x g 12 s x 197.g = 2364 g 1 Au 52. What is the mass in grams of 44.8 L of H 2 O at STP? 44.8L x 1 = 2 s 22.4L 2 s x 18 g = 36 g H 2 O 53. What is the mass in grams of L of NiF 3 at STP? 7.466L x 1 = s 22.4L s x g = 38.52g NiF 3 Stoichiometry 54. You have 48 grams of O 2 how many s of CO 2 can you produce? (2 steps) 2 C 2 H O 2 4 CO H 2 O 48g x 1 O 2 = 1.5 s O 2 32g 1.5 x 4CO 2 = 1.2 CO 2 CO 2 5 s O You have 23 grams of Na how many grams of H 2 can you produce? (3 steps) 2 Na + 2 H 2 O 2 NaOH + H 2 23 g x Na = 1 Na 23 g 1 Na x 1 H 2 = 0.5 Na 2 Na 0.5 Na x 2.00 g = 1.00 g H 2 1 H You have 54 grams of H 2 O how many grams of H 2 will you need? 2 Na + 2 H 2 O 2 NaOH + H 2 54 g x O 2 = 3 s 18 g

5 3 s x 1 H 2 = 1.5 H 2 2 H 2 O 1.5 H 2 x 2.00 g = 3.00 g 1 H Determine the mass of carbon dioxide produced when g of C 4 H 10 reacts with oxygen according to the following equation: 2C 4 H O 2 8CO H g x = 0.62 s C 4 H g 0.62 s x 8 CO 2 = 2.48 CO 2 2 C 4 H x 44 g = g 1 CO Determine the mass of H 2 0 produced when g of O 2 reacts according to the following equation: 2C 4 H O 2 8CO H g x O 2 = 2.00 s 32 g 2.00 s x 10 H 2 O = O H 2 x 18 g = g 1 H 2 O 59. Determine the mass of Ca(OH) 2 produced when g CaC 2 reacts with of water according to the following equation: CaC 2 + 2H 2 O Ca(OH) 2 + C 2 H g x O 2 = s g s x 1 Ca(OH) 2 = H 2 1 CaC Ca(OH) 2 x g = g 1 Ca(OH) 2

Stoichiometry Review

Stoichiometry Review Stoichiometry Review There are 20 problems in this review set. Answers, including problem set-up, can be found in the second half of this document. 1. N 2 (g) + 3H 2 (g) --------> 2NH 3 (g) a. nitrogen

More information

1. P 2 O 5 2. P 5 O 2 3. P 10 O 4 4. P 4 O 10

1. P 2 O 5 2. P 5 O 2 3. P 10 O 4 4. P 4 O 10 Teacher: Mr. gerraputa Print Close Name: 1. A chemical formula is an expression used to represent 1. mixtures, only 3. compounds, only 2. elements, only 4. compounds and elements 2. What is the total number

More information

Chapter 3 Stoichiometry: Calculations with Chemical Formulas and Equations

Chapter 3 Stoichiometry: Calculations with Chemical Formulas and Equations CHE11 Chapter Chapter Stoichiometry: Calculations with Chemical Formulas and Equations 1. When the following equation is balanced, the coefficients are. NH (g) + O (g) NO (g) + H O (g) (a). 1, 1, 1, 1

More information

Limiting Reactant and Percent Yield Practice

Limiting Reactant and Percent Yield Practice Limiting Reactant and Percent Yield Practice Name 1) Consider the following reaction: NH 4 NO 3 + Na 3 PO 4 (NH 4 ) 3 PO 4 + NaNO 3 Which reactant is limiting, assuming we started with 30.0 grams of ammonium

More information

1. Given the balanced equations representing two chemical reactions:

1. Given the balanced equations representing two chemical reactions: Name: 1. Given the balanced equations representing two chemical reactions: Cl2 + 2NaBr 2NaCl + Br 2 2NaCl 2Na + Cl2 Which type of chemical reactions are represented by these equations? A) single replacement

More information

Answers and Solutions to Text Problems

Answers and Solutions to Text Problems Chapter 7 Answers and Solutions 7 Answers and Solutions to Text Problems 7.1 A mole is the amount of a substance that contains 6.02 x 10 23 items. For example, one mole of water contains 6.02 10 23 molecules

More information

STOICHIOMETRY STOICHIOMETRY. Measurements in Chemical Reactions. Mole-Mole Relationships. Mass-Mass Problem. Mole-Mole Relationships

STOICHIOMETRY STOICHIOMETRY. Measurements in Chemical Reactions. Mole-Mole Relationships. Mass-Mass Problem. Mole-Mole Relationships STOICHIOMETRY STOICHIOMETRY The analysis of the quantities of substances in a chemical reaction. Stoichiometric calculations depend on the MOLE- MOLE relationships of substances. Measurements in Chemical

More information

c. PCl 3 (l) + 3H 2 O(l) H 3 PO 3 (l) + 3HCl(g)

c. PCl 3 (l) + 3H 2 O(l) H 3 PO 3 (l) + 3HCl(g) Chapter 9 Chemical Quantities 1. Although we define mass as the amount of matter in a substance, the units in which we measure mass are a human invention. Atoms and molecules react on an individual particleby-particle

More information

Solutions CHAPTER Specific answers depend on student choices.

Solutions CHAPTER Specific answers depend on student choices. CHAPTER 15 1. Specific answers depend on student choices.. A heterogeneous mixture does not have a uniform composition: the composition varies in different places within the mixture. Examples of non homogeneous

More information

Ch. 9 Chemical Reactions

Ch. 9 Chemical Reactions Ch. 9 Chemical Reactions I. Intro to Reactions (p. 282 285) I II III IV V Chemical Reaction Chemical change Atoms of one or more substances (reactants) are rearranged into new substances (products) Signs

More information

Tutorial 7 HEATS OF REACTION

Tutorial 7 HEATS OF REACTION T-54 Tutorial 7 HEATS OF REACTION In a chemical reaction bonds are broken in the reactants and new bonds formed in the products. Energy is required to break bonds and energy is released when bonds are

More information

Stoichiometry. 1. The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 0.1; (4) 0.2.

Stoichiometry. 1. The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 0.1; (4) 0.2. Stoichiometry 1 The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 01; (4) 02 2 A 44 gram sample of a hydrate was heated until the water of hydration was driven

More information

Chemical Equations. What is a chemical equation? How do you balance a chemical equation? How do you identify the type of chemical equation?

Chemical Equations. What is a chemical equation? How do you balance a chemical equation? How do you identify the type of chemical equation? Chemical Equations What is a chemical equation? How do you balance a chemical equation? How do you identify the type of chemical equation? Chemical Equations A chemical equation is written as an expression

More information

Unit 10A Stoichiometry Notes

Unit 10A Stoichiometry Notes Unit 10A Stoichiometry Notes Stoichiometry is a big word for a process that chemist s use to calculate amounts in reactions. It makes use of the coefficient ratio set up by balanced reaction equations

More information

Types of Chemical Reactions

Types of Chemical Reactions Why? Types of Chemical Reactions Do atoms rearrange in predictable patterns during chemical reactions? Recognizing patterns allows us to predict future behavior. Weather experts use patterns to predict

More information

Chemistry B11 Chapter 4 Chemical reactions

Chemistry B11 Chapter 4 Chemical reactions Chemistry B11 Chapter 4 Chemical reactions Chemical reactions are classified into five groups: A + B AB Synthesis reactions (Combination) H + O H O AB A + B Decomposition reactions (Analysis) NaCl Na +Cl

More information

Name Class Date. Chapter: Chemical Equations and Reactions

Name Class Date. Chapter: Chemical Equations and Reactions Assessment Chapter Test A Chapter: Chemical Equations and Reactions In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question. 1. You

More information

Tutorial 4 SOLUTION STOICHIOMETRY. Solution stoichiometry calculations involve chemical reactions taking place in solution.

Tutorial 4 SOLUTION STOICHIOMETRY. Solution stoichiometry calculations involve chemical reactions taking place in solution. T-27 Tutorial 4 SOLUTION STOICHIOMETRY Solution stoichiometry calculations involve chemical reactions taking place in solution. Of the various methods of expressing solution concentration the most convenient

More information

Chapter 12 Stoichiometry

Chapter 12 Stoichiometry Chapter 12 Stoichiometry I. How much can a reaction produce? (12.1) A. Proportional Relationships 1. like recipes 2. how much can I get? 3. how much do I need? Stoichiometry: mass and quantity relationships

More information

Calculating Atoms, Ions, or Molecules Using Moles

Calculating Atoms, Ions, or Molecules Using Moles TEKS REVIEW 8B Calculating Atoms, Ions, or Molecules Using Moles TEKS 8B READINESS Use the mole concept to calculate the number of atoms, ions, or molecules in a sample TEKS_TXT of material. Vocabulary

More information

2. The percent yield is the maximum amount of product that can be produced from the given amount of limiting reactant.

2. The percent yield is the maximum amount of product that can be produced from the given amount of limiting reactant. UNIT 6 stoichiometry practice test True/False Indicate whether the statement is true or false. moles F 1. The mole ratio is a comparison of how many grams of one substance are required to participate in

More information

STOICHOMETRY UNIT Determine the mass of carbon present in a sample of glucose weighing 5.4 g.

STOICHOMETRY UNIT Determine the mass of carbon present in a sample of glucose weighing 5.4 g. PERCENTAGE COMPOSITION STOICHOMETRY UNIT 3 1. A sample of magnesium weighing 2.246 g burns in oxygen to form 3.724 g of magnesium oxide. What are the percentages of magnesium and oxygen in magnesium oxide?

More information

Name Class Date. Chapter: Chemical Equations and Reactions

Name Class Date. Chapter: Chemical Equations and Reactions Assessment Chapter Test B Chapter: Chemical Equations and Reactions PART I In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question

More information

1. How many hydrogen atoms are in 1.00 g of hydrogen?

1. How many hydrogen atoms are in 1.00 g of hydrogen? MOLES AND CALCULATIONS USING THE MOLE CONCEPT INTRODUCTORY TERMS A. What is an amu? 1.66 x 10-24 g B. We need a conversion to the macroscopic world. 1. How many hydrogen atoms are in 1.00 g of hydrogen?

More information

Chem 1100 Chapter Three Study Guide Answers Outline I. Molar Mass and Moles A. Calculations of Molar Masses

Chem 1100 Chapter Three Study Guide Answers Outline I. Molar Mass and Moles A. Calculations of Molar Masses Chem 1100 Chapter Three Study Guide Answers Outline I. Molar Mass and Moles A. Calculations of Molar Masses B. Calculations of moles C. Calculations of number of atoms from moles/molar masses 1. Avagadro

More information

Chemical Reactions and Equations. Chapter 8

Chemical Reactions and Equations. Chapter 8 Chemical Reactions and Equations Chapter 8 Describing Chemical Reactions A chemical reaction is the process by which one or more substances are changed into different substances Reactants Products When

More information

CHM1 Review for Exam 9

CHM1 Review for Exam 9 Topics 1. Reaction Types a. Combustion b. Synthesis c. Decomposition d. Single replacement i. Metal activity series ii. Nonmetal activity series e. Double replacement i. Precipitates and solubility rules

More information

CHAPTER 9 CALCULATIONS FROM CHEMICAL EQUATIONS SOLUTIONS TO REVIEW QUESTIONS. = 2 mol PH 3. a g b = 0.4 g PH. = 12 mol H 2 O.

CHAPTER 9 CALCULATIONS FROM CHEMICAL EQUATIONS SOLUTIONS TO REVIEW QUESTIONS. = 2 mol PH 3. a g b = 0.4 g PH. = 12 mol H 2 O. HEINS09-095-117v4.qxd 1/30/06 1:58 PM Page 95 CHAPTER 9 CALCULATIONS FROM CHEMICAL EQUATIONS SOLUTIONS TO REVIEW QUESTIONS 1. A e ratio is the ratio between the e amounts of two atoms and/or ecules involved

More information

Do Now CHEMICAL REACTIONS. Chemical Reaction. chemical reaction. Chemical Equations. Evidence

Do Now CHEMICAL REACTIONS. Chemical Reaction. chemical reaction. Chemical Equations. Evidence Do Now CHEMICAL REACTIONS What are some signs that a chemical change may have taken place? Where are the reactants and products in a reaction? What do they represent? Describe the law of conservation of

More information

Ch 8 Notes: Chemical Equations and Reactions

Ch 8 Notes: Chemical Equations and Reactions Name: Ch 8 Notes: Chemical Equations and Reactions I. Chemical Equations A properly written chemical equation can summarize any chemical change. The following requirements will help you write and read

More information

CP Chemistry Review for Stoichiometry Test

CP Chemistry Review for Stoichiometry Test CP Chemistry Review for Stoichiometry Test Stoichiometry Problems (one given reactant): 1. Make sure you have a balanced chemical equation 2. Convert to moles of the known substance. (Use the periodic

More information

Chem 31 Fall 2002. Chapter 3. Stoichiometry: Calculations with Chemical Formulas and Equations. Writing and Balancing Chemical Equations

Chem 31 Fall 2002. Chapter 3. Stoichiometry: Calculations with Chemical Formulas and Equations. Writing and Balancing Chemical Equations Chem 31 Fall 2002 Chapter 3 Stoichiometry: Calculations with Chemical Formulas and Equations Writing and Balancing Chemical Equations 1. Write Equation in Words -you cannot write an equation unless you

More information

3. How many moles of KCl and O 2 are formed from the decomposition of 6 moles of KClO 3?

3. How many moles of KCl and O 2 are formed from the decomposition of 6 moles of KClO 3? What coefficients mean: 2 Na + Cl 2 2NaCl 2 Na 1 Cl 2 2NaCl 4 Na 2 Na + Cl 2 4Cl 2 6 moles Na 2NaCl 10 atoms Na ONLY WORKS FOR MOLES, MOLECULES, ATOMS 1. How many moles of H 2 and O 2 must react to form

More information

Mole - Mass Relationships in Chemical Systems

Mole - Mass Relationships in Chemical Systems Chapter 3: Stoichiometry Mole - Mass Relationships in Chemical Systems 3.1 The Mole 3.2 Determining the Formula of an Unknown Compound 3.3 Writing and Balancing Chemical Equations 3.4 Calculating the Amounts

More information

Student Exploration: Chemical Equations

Student Exploration: Chemical Equations Name: Date: Student Exploration: Chemical Equations Vocabulary: Avogadro s number, chemical equation, chemical formula, chemical reaction, coefficient, combination, combustion, conservation of matter,

More information

Stoichiometry (greek): Stoicheion element, metry to measure

Stoichiometry (greek): Stoicheion element, metry to measure Stoichiometry Stoichiometry (greek): Stoicheion element, metry to measure Balanced Chemical equation: Skills Tells Ex. formula writing balancing equations substances involved in the chemical rxn relationship

More information

Study Guide For Chapter 7

Study Guide For Chapter 7 Name: Class: Date: ID: A Study Guide For Chapter 7 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The number of atoms in a mole of any pure substance

More information

CP Chapter 11 Notes Reactions and Equations

CP Chapter 11 Notes Reactions and Equations CP Chapter 11 Notes Reactions and Equations Evidence of Chemical Reactions How can you tell a reaction has taken place? Temperature change Color change Gas/bubbles Appearance of a (precipitate) Chemical

More information

Test 4: Equations and Math of Equations Review

Test 4: Equations and Math of Equations Review Name: Tuesday, November 27, 2007 Test 4: Equations and Math of Equations Review 1. Given the balanced equation: 2KClO 2KCl + 3O 3 2 Which type of reaction is represented by this equation? 1. synthesis

More information

Steps for balancing a chemical equation

Steps for balancing a chemical equation The Chemical Equation: A Chemical Recipe Dr. Gergens - SD Mesa College A. Learn the meaning of these arrows. B. The chemical equation is the shorthand notation for a chemical reaction. A chemical equation

More information

Is it still balanced? Has anything changed? What does it mean? Is it still balanced? Has anything changed? What does it mean?

Is it still balanced? Has anything changed? What does it mean? Is it still balanced? Has anything changed? What does it mean? Chemistry 11 Unit VII Stoichiometry Introduction: Let s look at the following equation 2 H 2 + O 2 2 H 2 O The numbers in front of the H 2 and H 2 O are called coefficients. What do they tell us? They

More information

Chemical Equations and Stoichiometry

Chemical Equations and Stoichiometry 12. Chemical Equations A. Introduction to Equations Definition A chemical equation is a symbolic representation of a chemical reaction. Example: Whenever you light propane (C 3 H 8 ) in a gas barbecue,

More information

1. When the following equation is balanced, the coefficient of Al is. Al (s) + H 2 O (l)? Al(OH) 3 (s) + H 2 (g)

1. When the following equation is balanced, the coefficient of Al is. Al (s) + H 2 O (l)? Al(OH) 3 (s) + H 2 (g) 1. When the following equation is balanced, the coefficient of Al is. Al (s) + H 2 O (l)? Al(OH) (s) + H 2 (g) A) 1 B) 2 C) 4 D) 5 E) Al (s) + H 2 O (l)? Al(OH) (s) + H 2 (g) Al (s) + H 2 O (l)? Al(OH)

More information

7.1 Stoichiometry and Percent Yield

7.1 Stoichiometry and Percent Yield score /10 pts. Name Class Date 7.1 Stoichiometry and Percent Yield Mole Ratios An example: The combustion of propane is used to heat many rural homes in winter. Balance the equation below for the combustion

More information

Balance the following equation: KClO 3 + C 12 H 22 O 11 KCl + CO 2 + H 2 O

Balance the following equation: KClO 3 + C 12 H 22 O 11 KCl + CO 2 + H 2 O Balance the following equation: KClO 3 + C 12 H 22 O 11 KCl + CO 2 + H 2 O Ans: 8 KClO 3 + C 12 H 22 O 11 8 KCl + 12 CO 2 + 11 H 2 O 3.2 Chemical Symbols at Different levels Chemical symbols represent

More information

Balancing Equations Notes

Balancing Equations Notes . Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A Chemical Equation is a written representation of the process that occurs in a chemical reaction. A chemical equation is written

More information

Part I: Parts and Meaning of a Chemical Equation:

Part I: Parts and Meaning of a Chemical Equation: Chemical Equations Name: Period: Date: Part I: Parts and Meaning of a Chemical Equation: 1) = process by which one or more substances are changed into one or more different substances (atoms are rearranged)

More information

Moles. Moles. Moles. Moles. Balancing Eqns. Balancing. Balancing Eqns. Symbols Yields or Produces. Like a recipe:

Moles. Moles. Moles. Moles. Balancing Eqns. Balancing. Balancing Eqns. Symbols Yields or Produces. Like a recipe: Like a recipe: Balancing Eqns Reactants Products 2H 2 (g) + O 2 (g) 2H 2 O(l) coefficients subscripts Balancing Eqns Balancing Symbols (s) (l) (aq) (g) or Yields or Produces solid liquid (pure liquid)

More information

Chapter 5 Chemical Quantities and Reactions

Chapter 5 Chemical Quantities and Reactions Chapter 5 Chemical Quantities and Reactions 1 Avogadro's Number Small particles such as atoms, molecules, and ions are counted using the mole. 1 mole = 6.02 x 10 23 items Avogadro s number 602 000 000

More information

Chemical Reactions & Balancing Chemical Equations

Chemical Reactions & Balancing Chemical Equations Chemical Reactions & Balancing Chemical Equations Chemical Reactions A chemical reaction occurs when one or more materials turn into something different A balanced chemical equation describes what happens

More information

AP Chem Unit 1 Assignment 3 Chemical Equations

AP Chem Unit 1 Assignment 3 Chemical Equations Symbols used in chemical equations: Symbol Meaning + used to separate one reactant or product from another used to separate the reactants from the products - it is pronounced "yields" or "produces" when

More information

Percent Composition. Percent Composition the percentage by mass of each element in a compound. Percent = Part Whole x 100%

Percent Composition. Percent Composition the percentage by mass of each element in a compound. Percent = Part Whole x 100% Percent Composition Percent Composition the percentage by mass of each element in a compound Percent = Part Whole x 100% Percent composition of a compound or = molecule Mass of element in 1 mol x 100%

More information

Balancing Chemical Equations Practice

Balancing Chemical Equations Practice Science Objectives Students will describe what reactants and products in a chemical equation mean. Students will explain the difference between coefficients and subscripts in chemical equations. Students

More information

CHEMICAL REACTIONS. Chemistry 51 Chapter 6

CHEMICAL REACTIONS. Chemistry 51 Chapter 6 CHEMICAL REACTIONS A chemical reaction is a rearrangement of atoms in which some of the original bonds are broken and new bonds are formed to give different chemical structures. In a chemical reaction,

More information

Unit 6: Reactions and Stoichiometry (Link to Prentice Hall Text: Chapters 7, 8 & 9)

Unit 6: Reactions and Stoichiometry (Link to Prentice Hall Text: Chapters 7, 8 & 9) R e a c t i o n s a n d S t o i c h i o m e t r y N o t e s P a g e 1 Unit 6: Reactions and Stoichiometry (Link to Prentice Hall Text: Chapters 7, 8 & 9) Name: Date Due Assignments Page Number: Problem

More information

Ch.4 Solutions. Solutions for Practice Problems p Consider the following reaction. 2H 2(g) + O 2(g) 2H 2 O (l)

Ch.4 Solutions. Solutions for Practice Problems p Consider the following reaction. 2H 2(g) + O 2(g) 2H 2 O (l) Solutions for Practice Problems p. 114 Ch.4 Solutions 1. Consider the following reaction. 2H 2(g) + O 2(g) 2H 2 O (l) (a) Write the ratio of H 2 molecules: O 2 molecules: H 2 Omolecules. The ratio is given

More information

Chapter 8 Chemical Equations and Reactions

Chapter 8 Chemical Equations and Reactions Chapter 8 Chemical Equations and Reactions 1 Section 8.1 Objectives: List 3 observations that suggest that a chemical reaction has taken place. List 3 requirements for a correctly written chemical reaction.

More information

Easy Examples: Hd 10 + Bu 8 HdBu. Introduction. (l) or (aq)? Introduction. Symbols. Yields or Produces. Balancing. (l) or (aq)?

Easy Examples: Hd 10 + Bu 8 HdBu. Introduction. (l) or (aq)? Introduction. Symbols. Yields or Produces. Balancing. (l) or (aq)? Chemical Equations Chemical Equations Like a recipe: Introduction Reactants Products 2H 2 (g) + O 2 (g) 2H 2 O(l) Symbols (s) (l) (aq) (g) Introduction Yields or Produces solid liquid aqueous gas (l) or

More information

CHAPTER 4. AQUEOUS REACTION CHEMISTRY

CHAPTER 4. AQUEOUS REACTION CHEMISTRY CAPTER. AQUEOUS REACTION CEMISTRY solution - homogeneous mixture of or more substances; uniform distribution of particles and same properties throughout. A solution is composed of a solute dissolved in

More information

The Mole Notes. There are many ways to or measure things. In Chemistry we also have special ways to count and measure things, one of which is the.

The Mole Notes. There are many ways to or measure things. In Chemistry we also have special ways to count and measure things, one of which is the. The Mole Notes I. Introduction There are many ways to or measure things. In Chemistry we also have special ways to count and measure things, one of which is the. A. The Mole (mol) Recall that atoms of

More information

Experiment #8 - Types of Reactions and Conservation of Mass

Experiment #8 - Types of Reactions and Conservation of Mass Experiment #8 - Types of Reactions and Conservation of Mass Objectives: To become familiar with several different types of reactions. To study the law of conservation of mass. Safety glasses are required

More information

SCIENCE NSPIRED. Open the TI-Nspire TM document Balancing_Chemical_Equations_Practice.tns.

SCIENCE NSPIRED. Open the TI-Nspire TM document Balancing_Chemical_Equations_Practice.tns. Open the TI-Nspire TM document Balancing_Chemical_Equations_Practice.tns. In this activity you will use ChemBox feature of TI-Nspire TM technology to practice balancing chemical equations. Move to pages

More information

602X10 21 602,000,000,000, 000,000,000,000 6.02X10 23. Pre- AP Chemistry Chemical Quan44es: The Mole. Diatomic Elements

602X10 21 602,000,000,000, 000,000,000,000 6.02X10 23. Pre- AP Chemistry Chemical Quan44es: The Mole. Diatomic Elements Pre- AP Chemistry Chemical Quan44es: The Mole Mole SI unit of measurement that measures the amount of substance. A substance exists as representa9ve par9cles. Representa9ve par9cles can be atoms, molecules,

More information

Other Stoich Calculations A. mole mass (mass mole) calculations. GIVEN mol A x CE mol B. PT g A CE mol A MOLE MASS :

Other Stoich Calculations A. mole mass (mass mole) calculations. GIVEN mol A x CE mol B. PT g A CE mol A MOLE MASS : Chem. I Notes Ch. 12, part 2 Using Moles NOTE: Vocabulary terms are in boldface and underlined. Supporting details are in italics. 1 MOLE = 6.02 x 10 23 representative particles (representative particles

More information

Chemistry Stoichiometry. 45 points. Do not turn page until told to do so.

Chemistry Stoichiometry. 45 points. Do not turn page until told to do so. Chemistry 2010 Stoichiometry 45 points Do not turn page until told to do so. Stoichiometry Multiple Choice (Each worth 2 points) Identify the letter of the choice that best completes the statement or

More information

Chapter 6 Chemical Composition

Chapter 6 Chemical Composition Chapter 6 Chemical Composition 1. 100 washers 0.110 g 1 washer = 11.0 g (assuming 100 washers is exact) 100. g 1 washer 0.110 g = 909 washers 2. 500. g 1 cork 1.63 g = 306.7 = 307 corks 500. g 1 stopper

More information

Stoichiometry. Web Resources Chem Team Chem Team Stoichiometry. Section 1: Definitions Define the following terms. Average Atomic mass - Molecule -

Stoichiometry. Web Resources Chem Team Chem Team Stoichiometry. Section 1: Definitions Define the following terms. Average Atomic mass - Molecule - Web Resources Chem Team Chem Team Section 1: Definitions Define the following terms Average Atomic mass - Molecule - Molecular mass - Moles - Avagadro's Number - Conservation of matter - Percent composition

More information

CHEMISTRY CP Name: KEY Period: UNIT 5: TEST REVIEW SHEET MOLE CONVERSIONS, EMPIRICAL/MOLECULAR FORMULA, STOICHIOMETRY

CHEMISTRY CP Name: KEY Period: UNIT 5: TEST REVIEW SHEET MOLE CONVERSIONS, EMPIRICAL/MOLECULAR FORMULA, STOICHIOMETRY CHEMISTRY CP Name: KEY Period: UNIT 5: TEST REVIEW SHEET MOLE CONVERSIONS, EMPIRICAL/MOLECULAR FORMULA, STOICHIOMETRY MOLES AND MOLE CONVERSIONS 1. Things to Know: a. What is a mole? Avogadro s number

More information

Chemical Reactions, Counting Atoms, and Balancing Chemical Equations.

Chemical Reactions, Counting Atoms, and Balancing Chemical Equations. Chemical Reactions, Counting Atoms, and Balancing Chemical Equations. A Chemical Reaction is A process where one or more elements or compounds are changed into one or more different substances A process

More information

Percent Composition and Molecular Formula Worksheet

Percent Composition and Molecular Formula Worksheet Percent Composition and Molecular Formula Worksheet 1. What s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% 2. If the molar mass of the compound in problem 1 is

More information

Molar Mass Worksheet Answer Key

Molar Mass Worksheet Answer Key Molar Mass Worksheet Answer Key Calculate the molar masses of the following chemicals: 1) Cl 2 71 g/mol 2) KOH 56.1 g/mol 3) BeCl 2 80 g/mol 4) FeCl 3 162.3 g/mol 5) BF 3 67.8 g/mol 6) CCl 2 F 2 121 g/mol

More information

7-5.5. Translate chemical symbols and the chemical formulas of common substances to show the component parts of the substances including:

7-5.5. Translate chemical symbols and the chemical formulas of common substances to show the component parts of the substances including: 7-5.5 Translate chemical symbols and the chemical formulas of common substances to show the component parts of the substances including: NaCl [salt], H 2 O [water], C 6 H 12 O 6 [simple sugar], O 2 [oxygen

More information

Name Class Date. Section: Calculating Quantities in Reactions. Complete each statement below by writing the correct term or phrase.

Name Class Date. Section: Calculating Quantities in Reactions. Complete each statement below by writing the correct term or phrase. Skills Worksheet Concept Review Section: Calculating Quantities in Reactions Complete each statement below by writing the correct term or phrase. 1. All stoichiometric calculations involving equations

More information

Thermodynamics Review

Thermodynamics Review Thermodynamics Review 1. According to Reference Table I, the dissolving of NH 4Cl(s) in water is 1) exothermic and the heat of reaction is negative 2) exothermic and the heat of reaction is positive 3)

More information

The formation of a gas is evidence of. 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2)

The formation of a gas is evidence of. 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2) Chapter 8 Review The formation of a gas is evidence of 1. A chemical change. 2. A physical change. 3. No change in energy 4. Both (1) and (2) The formation of a gas is evidence of 1. A chemical change.

More information

GHW#9. Louisiana Tech University, Chemistry 100. POGIL Exercise on Chapter 4. Quantities of Reactants and Products: Equations, Patterns and Balancing

GHW#9. Louisiana Tech University, Chemistry 100. POGIL Exercise on Chapter 4. Quantities of Reactants and Products: Equations, Patterns and Balancing GHW#9. Louisiana Tech University, Chemistry 100. POGIL Exercise on Chapter 4. Quantities of Reactants and Products: Equations, Patterns and Balancing Why? In chemistry, chemical equations represent changes

More information

2. DECOMPOSITION REACTION ( A couple have a heated argument and break up )

2. DECOMPOSITION REACTION ( A couple have a heated argument and break up ) TYPES OF CHEMICAL REACTIONS Most reactions can be classified into one of five categories by examining the types of reactants and products involved in the reaction. Knowing the types of reactions can help

More information

Chapter 6 Notes Science 10 Name:

Chapter 6 Notes Science 10 Name: 6.1 Types of Chemical Reactions a) Synthesis (A + B AB) Synthesis reactions are also known as reactions. When this occurs two or more reactants (usually elements) join to form a. A + B AB, where A and

More information

Chapter 5 Chemical Quantities and Reactions. Collection Terms. 5.1 The Mole. A Mole of a Compound. A Mole of Atoms.

Chapter 5 Chemical Quantities and Reactions. Collection Terms. 5.1 The Mole. A Mole of a Compound. A Mole of Atoms. Chapter 5 Chemical Quantities and Reactions 5.1 The Mole Collection Terms A collection term states a specific number of items. 1 dozen donuts = 12 donuts 1 ream of paper = 500 sheets 1 case = 24 cans 1

More information

Unit 7 A1 Worksheet: Writing and Balancing Chemical Equations

Unit 7 A1 Worksheet: Writing and Balancing Chemical Equations Name Period Unit 7 A1 Worksheet: Writing and Balancing Chemical Equations 1. Describe the following word equation with a statement or sentence: Iron + Oxygen iron (III) oxide 2. In a chemical equation,

More information

Answers to Practice Problems 6.1, p Answers to Practice Problems 6.2, p. 227

Answers to Practice Problems 6.1, p Answers to Practice Problems 6.2, p. 227 Answers to Practice Problems 6.1, p. 226 1. This is a synthesis reaction (between a metal and a non-metal). The balanced chemical equation is: 2Li + Cl 2 2LiCl. 2. This is a synthesis reaction (between

More information

Solute and Solvent 7.1. Solutions. Examples of Solutions. Nature of Solutes in Solutions. Learning Check. Solution. Solutions

Solute and Solvent 7.1. Solutions. Examples of Solutions. Nature of Solutes in Solutions. Learning Check. Solution. Solutions Chapter 7 s 7.1 s Solute and Solvent s are homogeneous mixtures of two or more substances. consist of a solvent and one or more solutes. 1 2 Nature of Solutes in s Examples of s Solutes spread evenly throughout

More information

Reaction Type & Balancing Review Questions

Reaction Type & Balancing Review Questions Reaction Type & Balancing Review Questions There are 20 questions sets in this review. The corresponding answers can be found in the second half of this document. 1. Match the term with its proper description.

More information

Test 3 Formula and math of formula review. 2. The oxide of metal X has the formula XO. Which group in the Periodic Table contains metal X?

Test 3 Formula and math of formula review. 2. The oxide of metal X has the formula XO. Which group in the Periodic Table contains metal X? Name: Sunday, November 04, 2007 Test 3 Formula and math of formula review 1. Which is an example of a binary compound? 1. acetic acid 3. potassium hydroxide 2. nitric acid 4. potassium oxide 2. The oxide

More information

Chapter 3. Chemical Reactions and Reaction Stoichiometry. Lecture Presentation. James F. Kirby Quinnipiac University Hamden, CT

Chapter 3. Chemical Reactions and Reaction Stoichiometry. Lecture Presentation. James F. Kirby Quinnipiac University Hamden, CT Lecture Presentation Chapter 3 Chemical Reactions and Reaction James F. Kirby Quinnipiac University Hamden, CT The study of the mass relationships in chemistry Based on the Law of Conservation of Mass

More information

SNC2D Chemistry Review

SNC2D Chemistry Review SNC2D Chemistry Review Name: Draw the Bohr-Rutherford diagram for each of the following atoms and determine the valence charge of their ions: Sodium: Aluminum: Sulfur: Fluorine: From your periodic table/chemistry

More information

Honors Chemistry: Unit 6 Test Stoichiometry PRACTICE TEST ANSWER KEY Page 1. A chemical equation. (C-4.4)

Honors Chemistry: Unit 6 Test Stoichiometry PRACTICE TEST ANSWER KEY Page 1. A chemical equation. (C-4.4) Honors Chemistry: Unit 6 Test Stoichiometry PRACTICE TEST ANSWER KEY Page 1 1. 2. 3. 4. 5. 6. Question What is a symbolic representation of a chemical reaction? What 3 things (values) is a mole of a chemical

More information

Stoichiometry Dr. M. E. Bridge

Stoichiometry Dr. M. E. Bridge Preliminary Chemistry Course Stoichiometry Dr. M. E. Bridge What is stoichiometry? The meaning of the word: The word stoichiometry comes from two Greek words: (meaning element ) and (meaning measure )

More information

Stoichiometry. Lecture Examples Answer Key

Stoichiometry. Lecture Examples Answer Key Stoichiometry Lecture Examples Answer Key Ex. 1 Balance the following chemical equations: 3 NaBr + 1 H 3 PO 4 3 HBr + 1 Na 3 PO 4 2 C 3 H 5 N 3 O 9 6 CO 2 + 3 N 2 + 5 H 2 O + 9 O 2 2 Ca(OH) 2 + 2 SO 2

More information

Chapter 5, Calculations and the Chemical Equation

Chapter 5, Calculations and the Chemical Equation 1. How many iron atoms are present in one mole of iron? Ans. 6.02 1023 atoms 2. How many grams of sulfur are found in 0.150 mol of sulfur? [Use atomic weight: S, 32.06 amu] Ans. 4.81 g 3. How many moles

More information

Chapter 9. Answers to Questions

Chapter 9. Answers to Questions Chapter 9 Answers to Questions 1. Word equation: Silicon Tetrachloride + Water Silicon Dioxide + Hydrogen Chloride Formulas: Next, the chemical formulas are needed. As these are all covalent compounds,

More information

Ex: 1. 1 mol C H O g C H O. Ex: mol C H O mol C H O.

Ex: 1. 1 mol C H O g C H O. Ex: mol C H O mol C H O. Example of how to solve a mass-to-mass stoichiometry problem Example Problem: If 1.00 gram of the simple sugar fructose (C 6 H 12 O 6 ) is burned in atmospheric oxygen of (O 2 ), what mass of carbon dioxide

More information

Chemical Quantities: The Mole Chapter 7 Assignment & Problem Set

Chemical Quantities: The Mole Chapter 7 Assignment & Problem Set Chemical Quantities: The Mole Name Warm-Ups (Show your work for credit) Date 1. Date 2. Date 3. Date 4. Date 5. Date 6. Date 7. Date 8. Chemical Quantities: The Mole 2 Study Guide: Things You Must Know

More information

1. The percent by mass of nitrogen in Mg(CN) 2 is equal to 1) 3)

1. The percent by mass of nitrogen in Mg(CN) 2 is equal to 1) 3) 1. The percent by mass of nitrogen in Mg(CN) 2 is equal to 2. A compound consists of 40.% sulfur and 60.% oxygen by mass. What is the empirical formula of this compound? 1) SO 2) SO 2 3) SO 3 4) SO 4 3.

More information

Stoichiometry. 1. The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 0.1; (4) 0.2.

Stoichiometry. 1. The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 0.1; (4) 0.2. Stoichiometry 1 The total number of moles represented by 20 grams of calcium carbonate is (1) 1; (2) 2; (3) 01; (4) 02 2 A 44 gram sample of a hydrate was heated until the water of hydration was driven

More information

W1 WORKSHOP ON STOICHIOMETRY

W1 WORKSHOP ON STOICHIOMETRY INTRODUCTION W1 WORKSHOP ON STOICHIOMETRY These notes and exercises are designed to introduce you to the basic concepts required to understand a chemical formula or equation. Relative atomic masses of

More information

Answers and Solutions to Text Problems

Answers and Solutions to Text Problems Chapter 6 Answers and Solutions 6 Answers and Solutions to Text Problems 6.1 A chemical change occurs when the atoms of the initial substances rearrange to form new substances. Chemical change is indicated

More information

Balancing Chemical Equations Worksheet

Balancing Chemical Equations Worksheet Balancing Chemical Equations Worksheet Student Instructions 1. Identify the reactants and products and write a word equation. 2. Write the correct chemical formula for each of the reactants and the products.

More information

21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11

21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11 21 st Century Chemistry Multiple Choice Question in Topic 3 Metals Unit 11 1. Consider the equation: 2Ca(s) + O 2 (g) 2CaO(s) Which of the following statements are correct? (1) Calcium and oxygen are reactants.

More information

Chemistry 51 Chapter 8 TYPES OF SOLUTIONS. A solution is a homogeneous mixture of two substances: a solute and a solvent.

Chemistry 51 Chapter 8 TYPES OF SOLUTIONS. A solution is a homogeneous mixture of two substances: a solute and a solvent. TYPES OF SOLUTIONS A solution is a homogeneous mixture of two substances: a solute and a solvent. Solute: substance being dissolved; present in lesser amount. Solvent: substance doing the dissolving; present

More information