END OF COURSE CHEMISTRY

Transcription

1 VIRINI STNRS O LERNIN Spring 2008 Released Test EN O OURSE EMISTRY orm S0118, ORE 1 This released test contains 1 fewer test item (#1 49 only) than an original SOL EO hemistry test. Property of the Virginia epartment of Education 2008 by the ommonwealth of Virginia, epartment of Education, P.O. ox 2120, Richmond, Virginia ll rights reserved. Except as permitted by law, this material may not be reproduced or used in any form or by any means, electronic or mechanical, including photocopying or recording, or by any information storage or retrieval system, without written permission from the copyright owner. ommonwealth of Virginia public school educators may reproduce any portion of these released tests for non-commercial educational purposes without requesting permission. ll others should direct their written requests to the Virginia epartment of Education, ivision of Student ssessment and School Improvement, at the above address or by to Student_ssessment@doe.virginia.gov.

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3 hemistry irections Read each question and choose the best answer. Then fill in the circle on your answer document for the answer you have chosen. SMPLE Which of the following is a balanced equation? 2 + r2 2r 2 + r2 r 2 + 2r2 2r r 2 r 3

4 1 Trial oncentration M M 1.02 M M M student performed a series of titrations to find the concentration of an unknown acid. The results of the titrations are shown in the data table. What is the mean of this set of data? M M M 1.00 M 2 Iodine-131 is a radioactive isotope with a half-life of 8 days. ow many grams of a 64 g sample of iodine-131 will remain at the end of 24 days? 56 g 48 g 32 g 8 g 3 Which of the following is the correct name for the compound Mn? 3 Manganese fluoride(iii) Manganese(III) fluoride Manganese(I) fluoride(iii) Manganese(III) fluoride(iii) 4

5 4 The name of the salt formed by the neutralization of hydrochloric acid and sodium hydroxide is sodium chloride sodium chlorate sodium chlorite sodium hypochlorite 5 If the quantity of heat lost or gained is ( ) = mass change in T specific heat, what is the amount of heat required to raise g of water from to ? Specific heat of water is g i joules 6,521 joules 65,210 joules 652,100 joules 6 amg(o) 2 + bl cmgl2 + d2o The coefficients necessary to balance the equation correctly are a = 2,b = 1,c = 1,d = 2 a = 1,b = 2,c = 1,d = 2 a = 1,b = 1,c = 1,d = 1 a = 2,b = 2,c = 1,d = 1 5

6 7 balloon is filled with 3.8 L of helium gas at STP. pproximately how many moles of helium are contained in the balloon? 0.17 mol 0.26 mol 72 mol 85 mol 8 Which of these elements has the smallest atomic radius? eryllium (e) Oxygen (O) Sodium (Na) Sulfur (S) 9 If ml of a 0.96 M solution of acetic acid ( O ) are diluted to ml, what will be the approximate molarity of the final solution? 0.19 M 0.24 M 0.30 M 0.77 M 6

7 10 n atom contains 70 protons, 70 electrons, and 99 neutrons. What is the mass number? Which set of equipment would be most useful to determine the density of a liquid? alance and periodic table Periodic table and thermometer alance and graduated cylinder raduated cylinder and thermometer 7

8 12 Sodium chloride conducts electricity when dissolved in water. What type of bond is present in Nal? Nonpolar covalent Polar covalent ydrogen Ionic 13 Test tube Original mixture unnel ilter paper Residue Test tube iltrate The picture shows a filtration process. Which of these is least likely to pass into the test tube? issolved gases issolved salts Liquid solvents Solid particles 8

9 14 Which of the following represents the Lewis dot diagram of ammonia N (N )? 3 N N N 15 fter 1911, most scientists accepted the theory that the nucleus of an atom was very dense and very small and had a positive charge. What led scientists to accept this theory? alton s theory of the atom was over 100 years old. Scientists before 1911 used the scientific method of inquiry improperly. new model proved that the quantum theory of the atom was inaccurate. Rutherford did an experiment firing alpha particles at a thin piece of gold foil. 9

10 sodium atom has an electron configuration of 1s 2s 2p 3s. If the sodium atom becomes ionized, its new electron configuration will be the same as which element? Lithium Neon Magnesium Potassium 17 Which reaction is correctly balanced? e + uso eso + u 4 4 e + uso eso + u 4 4 2e + uso 2eSO + u 4 4 e + 2uSO 2eSO + u Which of the following particles has a positive one ( +1) charge? lpha Electron Neutron Proton 10

11 19 What is the mass of one mole of O? 2 24 g 28 g 44 g 56 g 20 ccording to the periodic table, Mg will most likely react with elements in which of these groups?

12 21 sample of a gas is in a cylinder as shown. If the temperature is kept constant and the piston moves down to decrease the volume, the pressure increases because the gas particles expand lose velocity within the container become smaller collide more frequently with the container 22 Which of the following shows the correct number of atoms of each element in the formula Mg( NO )? magnesium atom, 2 nitrogen atoms, and 6 oxygen atoms 1 magnesium atom, 2 nitrogen atoms, and 5 oxygen atoms 1 magnesium atom, 1 nitrogen atom, and 6 oxygen atoms 1 magnesium atom, 1 nitrogen atom, and 5 oxygen atoms 12

13 23 student is given a container of potassium nitrate crystals. In order to determine the exact mass of the potassium nitrate using a triple beam balance, he must know the mass of the filled container and the chemical formula for potassium nitrate mass of the filled container and the density of potassium nitrate volume of the filled container and the volume of the potassium nitrate mass of the empty container and the mass of the filled container and -13 are naturally-occurring isotopes of the element carbon. -12 occurs 98.89% of the time and -13 occurs 1.108% of the time. What calculation should be used to determine the atomic mass of this element? ( ) + ( ) 2 ( ) ( ) ( ) + ( ) ( ) 25 + energy + The general equation shown is a reaction that is an exothermic decomposition endothermic decomposition endothermic synthesis exothermic synthesis 13

14 26 Temperature y x eat Examine the graph of the temperature of a compound versus heat added to the compound. Which of the following most likely happens as the compound is heated from point x to point y? The phase of the compound changes. The mass of the compound is increasing. The molecules of the compound lose potential energy. The molecules of the compound are breaking apart into atoms. 27 In order to determine the identity of a substance, a student listed the following properties. Which of the following is a chemical property? Oxidizes in air onducts an electric current ttraction to a magnet issolves in water 14

15 28 The following results of a scientific study on water were found in a chemistry handbook. Vapor Pressure (mm g) Properties of Water Molar Mass: g/mole Melting Point: 0.0 oiling Point: Vapor Pressure of Water Temperature ( ) What is the independent variable in the study? Molar mass Melting point Vapor pressure Temperature 29 Which of the following is a solid/solid solution? n alloy of gold and copper mixture of argon and krypton strongly electrolytic acid neutralized base 15

16 30 Which of these compounds is most likely to contain an ionic bond? 2 SO 2 4 al 2 31 The composition of dry air is approximately 78% nitrogen, 21% oxygen, and 1% other gases. What is the partial pressure of nitrogen at standard atmospheric pressure (101.3 kpa)? 21.0 kpa 79.0 kpa kpa kpa 32 gas has a volume of ml at a pressure of mm g. If the temperature is held constant, what is the volume of the gas at a pressure of mm g? ml ml ml ml 16

17 33 Which of the following solutions will have the greatest concentration? 2 moles of solute dissolved in 1 liter of solution 0.3 mole of solute dissolved in 0.6 liter of solution 2 moles of solute dissolved in 10 liters of solution 0.1 mole of solute dissolved in 0.5 liter of solution 34 u + 2gNO3 u(no 3) 2 + 2g The chemical equation shown is an example of a single-replacement reaction synthesis reaction decomposition reaction double-replacement reaction 35 Which element is a noble gas? luorine () ydrogen () Nitrogen (N) Xenon (Xe) 17

18 36 To determine if a reaction is exothermic, a student should use a p probe motion sensor pressure sensor temperature probe 37 What is the name of N O? 4 mmonium hydroxide Nitrogen oxygen hydride Nitrogen hydroxide mmonium oxygen hydride 38 student hypothesizes that the solubility of a particular solute in water is nearly constant as temperature varies. The student can best test the hypothesis by doing which of the following? Researching the chemical properties of many different solutes Measuring the solubility of the solute at five different temperatures rawing diagrams of the molecular structures of water and of the solute Measuring the solubility of several different solutes at a fixed temperature 18

19 39? P? r? Pr Which set of coefficients will balance this equation? 3, 1, 1 2, 3, 2 3, 2, 3 2, 6, 2 19

20 40 Volume (m 3 ) Pressure (kpa) Volume (m 3 ) Pressure (kpa) The table shows the measurements of the volume and the pressure of a portion of a gas at constant temperature. fter graphing, the data reveals that the volume is inversely proportional to pressure directly proportional to pressure inversely proportional to pressure squared directly proportional to pressure squared 41 What is the correct name for the compound PO? 4 6 Phosphoric acid Phosphorus oxide Phosphorus(IV) oxide Tetraphosphorus hexoxide 20

21 42 2e(s) + O ( g) 2eO(s) 2 To which category does this reaction belong? Synthesis ecomposition Single replacement ouble replacement 43 s heat is added to a substance undergoing a phase change, the temperature remains constant because the energy is being used to break covalent bonds lower the specific heat capacity overcome intermolecular forces oppose electron cloud repulsions 44 2Na + 2 O 2NaO ow many moles of hydrogen gas are produced when mole of sodium is completely reacted? mol mol mol mol 2 21

22 45 The accepted value for the specific heat of aluminum is Which g i. of the following sets of specific heat values for aluminum, calculated from a prior experiment, has the greatest accuracy and precision? g, g, i i g i g, g, i i g i g, 1.04 g, 1.03 i i g i g, g, i i g i M aqueous solution of which substance would have the lowest p? N 3 l a(o) 2 Na 47 What is the chemical formula for iron(ii) phosphide? e P 2 e P 2 3 ep 2 e 3 P 2 22

23 48 In a mixture of oxygen (O 2 ) and nitrogen ( N 2 ) gas, 80.0 percent of the total gas pressure is exerted by the nitrogen. If the total pressure is 2.0 atm, what pressure does the oxygen exert? 0.20 atm 0.40 atm 0.80 atm 1.6 atm 49 2PO + 3Mg(O) Mg(PO ) + 6O Phosphoric acid, PO 3 4, is neutralized by magnesium hydroxide, Mg(O) 2, according to the equation shown. ow many moles of water will be produced from the neutralization of 0.24 mole of PO? mol 0.48 mol 0.72 mol 1.44 mol 23

24 nswer Key-EO015-S0118 Test Sequence Number orrect nswer Reporting ategory Reporting ategory escription Scientific Investigation tomic Structure and Periodic Relationships Nomenclature, hemical ormulas, and Reactions Molar Relationships Phases of Matter and Kinetic Molecular Theory Nomenclature, hemical ormulas, and Reactions Molar Relationships tomic Structure and Periodic Relationships Molar Relationships tomic Structure and Periodic Relationships Scientific Investigation Nomenclature, hemical ormulas, and Reactions Scientific Investigation Nomenclature, hemical ormulas, and Reactions Scientific Investigation tomic Structure and Periodic Relationships Nomenclature, hemical ormulas, and Reactions tomic Structure and Periodic Relationships Molar Relationships Nomenclature, hemical ormulas, and Reactions Phases of Matter and Kinetic Molecular Theory Nomenclature, hemical ormulas, and Reactions Scientific Investigation tomic Structure and Periodic Relationships Nomenclature, hemical ormulas, and Reactions Phases of Matter and Kinetic Molecular Theory tomic Structure and Periodic Relationships Scientific Investigation Phases of Matter and Kinetic Molecular Theory Nomenclature, hemical ormulas, and Reactions Phases of Matter and Kinetic Molecular Theory Phases of Matter and Kinetic Molecular Theory Molar Relationships Nomenclature, hemical ormulas, and Reactions tomic Structure and Periodic Relationships Scientific Investigation Nomenclature, hemical ormulas, and Reactions Scientific Investigation Nomenclature, hemical ormulas, and Reactions Scientific Investigation Nomenclature, hemical ormulas, and Reactions Nomenclature, hemical ormulas, and Reactions Phases of Matter and Kinetic Molecular Theory Molar Relationships Scientific Investigation Molar Relationships Nomenclature, hemical ormulas, and Reactions Phases of Matter and Kinetic Molecular Theory Molar Relationships

25 hemistry, ore 1 If you get this many items correct: Then your converted scale score is:

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