What are the missing coefficients for the skeleton equation below? Al 2 (SO 4 ) 3 + KOH Al(OH) 3 + K 2 SO 4 2. In a double displacement reaction, A. 1,6,2,3 B. 2,12,4,6 C. 1,3,2,3 D. 4,6,2,3 E. 2,3,1,1 A. the reactants are two elements B. the products are always molecular C. the products are a new element and a new compound D. the reactants are two ionic compounds E. the reactant is always oxygen 3. In the chemical equation, H 2 O 2 H 2 + O 2, the H 2 O 2 is a A. solid B. product C. gas D. reactant E. catalyst 4. When glucose is consumed it reacts with oxygen in the body to produce carbon dioxide, water and energy. How many grams of carbon dioxide would be produced if 45 g of C 6 H 12 O 6 completely reacted with oxygen? A. 1.8 g B. 1.5 g C. 12000 g D. 66 g E. 11 g 5. If you rewrite the following word equation as a balanced equation, what will the coefficient and symbol for iodine be? Bromine + potassium iodide potassium bromide + iodine A. 2 I B. I 2 C. 2I 2 D. I 6. What are the missing coefficients for the skeleton equation below? NH 3 + O 2 N 2 + H 2 O A. 2,3,2,3 B. 3,4,6,2 C. 4,3,2,6 D. 2,1,2,3 E. 1,2,1,3
7. What does the symbol (s) in a chemical equation mean? A. a catalyst is needed B. substance is a solid C. heat is supplied to the reaction D. yields 8. A double displacement reaction takes place when aqueous cobalt (III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction would be A. LiCo 3 B. LiCl 3 C. Cl 3 OH D. Co(OH) 2 E. Co(OH) 3 9. In every balanced chemical equation, each side of the equation has the same number of A. atoms B. subscripts C. coefficients D. molecules E. moles 10. Chemical reactions A. only occur outsied living organisms B. occur only in living organisms C. create and destroy atoms D. produce new substances 11. In order for the reaction 2Al + 6 HCl 2 AlCl 3 + 3H 2 to occur, which of the following must be true? A. heat must be supplied for the reaction B. Al must be above H on the activity series C. a gas must be formed D. Al must be above Cl on the activity series E. H must be above Al on the activity series 12. A catalyst is A. a solid product of a reaction B. not used up in a reaction C. the product of a combustion reaction D. one of the reactants in a single displacement reaction
13. When postassium hydroxide and barium chloride react, potassium chloride and barium hydroxide are formed. The balanced equation for this reaction is: A. KOH + BaCl KCl + BaOH B. 2KOH + 2BaCl2 2KCl 2 + 2Ba(OH) 2 C. KOH + BaCl 2 KCl 2 + BaOH D. 2KOH + BaCl 2 2KCl + Ba(OH) 2 E. KOH + BaCl KCl + BaH 14. Write a baanced equation for the synthesis reaction that takes place when iron (III) oxide is formed from its constituent elements. A. 3Fe + O Fe 3 O B. Fe 2 + O 3 Fe 2 O 3 C. Fe + O 3 FeO 3 D. 2Fe + 3O Fe 2 O 3 E. 4Fe + 3O 2 2Fe 2 O 3 15. When the equation Fe + Cl 2 FeCl 3, is balanced, what is the coefficient for Cl 2? A. 2 B. 1 C. 4 D. 3 16. What is the balanced equation for the reaction between bromine and sodium iodide? A. Br 2 + 2NaI 2NaBr + I 2 B. Br 2 + 2NaI 2NaBr + 2I C. Br + NaI 2 NaBrI 2 D. Br 2 + NaI NaBr 2 + I E. Br + NaI 2 NaBr + I 2 17. The reaction, 2Fe + 3Cl 2 2FeCl 3, is an example of which type of reaction? A. single displacement B. synthesis C. combustion D. decomposition yg y are needed to produce 36.0 g of hydrogen? Be + 2 H 2 O Be(OH) 2 + H 2 A. 162 g B. 3324 g C. 648 g D. 4.00g E. 36.0 g
19. The equation, Mg + 2HCl MgCl 2 + H 2 is an example of which type of reaction? A. double displacement B. single displacement C. synthesis D. decomposition 20. What are the correct formulas and coefficients for the products of the double displacement reaction RbOH + H 3 PO 4? A. 3RbH + H 2 OPO 4 B. Rb 3 PO 4 + 2H 2 O C. RbPO 4 + 2H 2 O D. Rb(PO 4 ) 3 + H 2 O E. H 3 Rb + PO 4 OH 21. The equation H 3 PO 4 + 3KOH K 3 PO 4 + 3H 2 O is an example of which type of reaction? A. synthesis B. single displacement C. double displacement D. decomposition 22. When the equation for the complete combustion of ehanol, C 2 H 3 OH, is balanced, what is the coefficient for oxygen? A. 7 B. 14 C. 1 D. 6 E. 3 23. In order to predict whether or not a single displacement reaction takes place, we need to consult a chart which shows the A. periodic table B. formulas and names of common metal ions C. ionic charges of representative elements D. activity series of metals E. common polyatomic ions 24. In a double displacement reaction A. the reactants are usually a metal and a nonmetal B. energy in the form of heat or light is often produced C. the reactants are generally two ionic compounds in aqueous solution D. one of the reactants is often water
25. A double displacement reaction takes place when Na 2 Co 3 reacts with aqueous Sn(NO 3 ) 2. You would expect one of the products of this reaction to be A NaNo 3 B. NaSn C. CNO 3 26. In a combustion reaction, one of the reactants is A. a binary ionic compound B. nitrogen C. a metal D. hydrogen E. oxygen D. Sn(CO 3 ) 2 27. Which of the following is the correctly balanced equation for the complete combustion of heptene, C 7 H 14? A. C 7 H 14 + O 2 C 7 O 2 + 7H 2 B. C 7 H 14 + 14 O 2 7CO + 7H 2 O C. C 7 H 14 + 7O 2 7CO 2 + 7H 2 O D. C 7 H 14 + 7O 2 7CO + 7H 2 O E. 2C 7 H 14 + 21O 2 14CO 2 + 14H 2 O 28. The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a A. single displacement B. synthesis C. combustion D. decomposition E. double displacement 29. The calculation of quantities in a balanced chemical equation is called A. percent yield B. dimensional analysis C. stoichiometry D. accuracy and precision E. percent compostion 30. In every chemical reaction A. mass and atoms are conserved B. mass and liters are conserved C. moles and liters are conserved D. mass and molecules are conserved E. moles and molecules are conserved
31. In a chemical reaction the mass of the products A. is greater than the mass of the reactants B. is less than the mass of the reactants C. has no relationship to the mass of the reactants D. is equal to the mass of the reactan 32. How many moles of aluminum are needed to react completely with 1.2 mol of FeO? A. 1.6 mol B. 1.2 mol C. 0.8 mol D. 2.4 mol E. 4.8 mol 33. Calculate the number of moles of Al 2 o 3 that are produced when 0.60 mol of Fe is produced in the following reaction. A. 0.60 mol B. 1.8 mol C. 0.04 mol D. 0.90 mol E. 0.20 mol 34. How many moles of glucose, C 6 H 12 O 6, can be burned biologically when 10.0 moles of oxygen is available? C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O A. 1.67 mol B. 0.938 mol C. 53.3 mol D. 60.0 mol E. 302 mol 35. What are the missing coefficients for the skeleton equation below? Cr + Fe(NO 3 ) 2 Fe + Cr(NO 3 ) 3? A. 2,3,1,2 B. 2,3,2,3 C. 2,3,3,2 D. 4,6,6,4 E. 1,3,3,1 36. What are the missing coefficients for the skeleton equation below? AlCl 3 + NaOH Al(OH) 3 + NaCl A. 3,1,3,1 B. 1,1,1,3 C. 3,1,1,1 D. 1,3,3,1 E. 1,3,1,3
37. What are the missing coefficients for the skeleton equation below? N 2 + H 2 NH 3 A. 3,1,3 B. 1,3,2 C. 1,3,3 D. 1,1,2 E. 2,6,6 38. When the following equation is balanced, what is the coefficient for HCl? Mg + HCl MgCl 2 + H 2 A. 2 B. 3 C. 6 D. 1 39. Chemical equations must be balanced to satisfy A. law of multiple proportions B. law of conservation of mass C. principle of Avogadro D. law of definite proportions 40. Symbols used in equations, together with explanations of the symbols, are shown below. Which set is correct? A. (g) grams B. (aq) dissolved in water C. solid is formed D. (l) liters 41. Write a balanced equation to represent the decomposition of lead (IV) oxide. A. 2PbO 2Pb + O 2 B. Pb 2 O 2Pb + O C. PbO 2 Pb + 2O D. PbO PB + O 2 E. PbO 2 Pb + O 2 42. The equation, 2C 3 H 7 OH + 9O 2 6CO 2 + 8H 2 O, is an example of which type of reaction? A. Double displacement B. Decomposition C. Single Displacement D. Combustion
43. Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of iron (III) oxide are formed when 16.7 g of iron reacts completely with oxygen? A. 12.0g B. 47. 8g C. 23.9g D. 267g E. 95.6g How many grams of H 3 PO 4 are produced when 100 moles of water react with excess P 4 O 10? A. 1.22 g B. 653 g C. 6.7 g D. 1180 g E. 147 g 45. Which of the following terms do we use to identify a starting substance in a chemical reaction? A. product B. chemical equation C. reactant D. coefficient 46. Which of the following is not a true statement about what happens in all chemical reactions? A. The ways in which atoms are joined together are changed B. New atoms are formed as products C. The starting materials are called reactants D. The bonds of the reactants are broken and new bonds of the products are formed E. In a word equation representing a chemical reaction, the reactants are generally written on the left and the products on the right 47. A catalyst is A. the product of a combustion reaction B. not used up in a reaction C. one of the reactants in a single displacement reaction D. a solid product in a reaction 48. In every balanced chemical equation, each side of the equation has the same number of A. atoms B. molecules C. moles D. coefficients E. subscripts
49. In the activity series of metals, which metal(s) will displace hydrogen from an acid? A. any metal B. only metals above hydrogen C. only metals below hydrogen D. only metals from Li to Na E. only gold 50. Which of the following reactions will NOT take place in the direction written? A. Cu + HCl B. Ca + Pb(NO 3 ) 2 C. Ag + AuCl 3 D. Zn + HNO 3 E. K + H 2 SO 4 51. Which of the following terms describes the amount of product formed when a reaction is carried out in the laboratory? A. theoretical yield B. percent yield C. excess reagent D. actual yield 52. Which of the following does not describe a limiting reactant? A. the reactant that is completely consumed B. the reactant that determines the amount of product C. the reactant that runs out first D. the reactant with the smallest number of grams 53. Which of the following is NOT a true statement about yield? A. The value of the actual yield must be given in order for the percent yield to be calculated B. The actual yield is often less than the theoretical yield. C. The percent yield is the ratio of the actual yield to the theoretical yield. D. The actual yield may be different from the theoretical yield because reactions do not always go to completion. E. The actual yield may be different from the theoretical yield because insufficient limiting reagent was used. 54. When an equation is used to calculate an amount of product that will form during a reaction, then the value obtained is called the A. actual yield B. percent yield C. theoretical yield D. minimum yield E. percent composition
55. Which of the following is NOT a true statement concerning limiting and excess reagents? A. The amount of product obtained is determined by the limiting reagent. B. A balanced equation is necessary to determine which reactant is the limiting reagent. C. Some of the excess reagent is left over after the reaction is complete. D. The reactant that has the smallest given mass is the limiting reagent. E. Adding more of the limiting reagent to the reaction chamber will cause more product to be produced.