2 11. For the reaction represented by the equation CH4 + 2O2 CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane?a molb molc mold. 25 mol
3 2. For the reaction represented by the equation Pb(NO3)2 + 2KI PbI2 + 2KNO3, how many moles of lead(II) iodide are produced from 300. g of potassium iodide and an excess of Pb(NO3)2?a molb molc mold mol
4 21. For the reaction represented by the equation Cl2 + 2KBr 2KCl + Br2, how many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?a gb. 111 gc. 188 gd. 451 g
5 2. A chemist interested in the efficiency of a chemical reaction would calculate the a. mole ratio.b. energy released.c. percentage yield.d. rate of reaction.
6 3 1. If the percentage yield is equal to 100%, then a. the actual yield is greater than the theoretical yield.b. the actual yield is equal to the theoretical yield.c. the actual yield is less than the theoretical yield.d. there was no limiting reactant.
7 2. For the reaction represented by the equation Cl2 + 2KBr 2KCl + Br2, calculate the percentage yield if 200. g of chlorine react with excess potassium bromide to produce 410. g of bromine.a. 73.4%b. 82.1%c. 91.0%d. 98.9%
8 41. What is the maximum possible amount of product obtained in a chemical reaction?a. theoretical yieldb. percentage yieldc. mole ratiod. actual yield
9 2. For the reaction represented by the equation SO3 + H2O H2SO4, how many grams of sulfuric acid can be produced from 200. g of sulfur trioxide and 100. g of water?a gb gc. 245 gd. 285 g
10 51. After calculating the amount of reactant B required to completely react with A, then comparing that amount with the amount of B available, one can determine thea. limiting reactant.b. rate of the reaction.c. energy released in the reaction.d. pathway of the reaction.
11 2. For the reaction represented by the equation 2Na + 2H2O 2NaOH + H2, how many grams of hydrogen are produced if 120. g of sodium and 80. g of water are available?a. 4.5 gb. 45 gc. 80. gd. 200 g
12 Answers & Standards 1.1. ANS: A STA: SC2.d 1.2. ANS: A STA: SC2.d 2.1. ANS: C STA: SC2.d2.2. ANS: C STA: SC2.eANS: B STA: SC2.e3.2. ANS: C STA: SC2.e4.1. ANS: A STA: SC2.eANS: C STA: SC2.d5.1. ANS: A STA: SC2.e5.2. ANS: A STA: SC2.d