Hon 3 6-3 7 Review-key reaction Stoichiometry

# A mole ratio b percent yield c avogadro yield d

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A) mole ratio B) percent yield C) Avogadro yield D) excess yield Answer: B 7) What is the measured amount of a product obtained from a chemical reaction? A)mole ratio B) percent yield C) theoretical yield D) actual yield Answer: D 8) In most chemical reactions the amount of product obtained is A) equal to the theoretical yield. B) less than the theoretical yield. C) more than the theoretical yield. D)more than the percent yield. Answer: B 9) In the reaction N 2 + 3H 2 → 2NH 3 , what is the mole ratio of nitrogen to ammonia? A) 1:1 B) 1:2

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C) 1:3 D) 2:3 Answer: B 10) In the reaction 2H 2 + O 2 → 2H 2 O, what is the mole ratio of oxygen to water? A) 1:2 B) 2:1 C) 8:1 D) 1:4 Answer: A 11) Lithium and nitrogen react to produce lithium nitride: 6Li (s) + N 2 (g) 2Li 3 N (s) How many moles of lithium nitride are produced when 0.400 mol of lithium react in this fashion? A) 0.133 B) 0.800 C) 0.0667 D) 1.20 E) 0.200 Answer: A 12) The combustion of propane (C 3 H 8 ) in the presence of excess oxygen yields CO 2 and H 2 O: C 3 H 8 (g) + 5 O 2 (g) 3CO 2 (g) + 4 H 2 O (g) When 2.5 mol of O 2 are consumed in their reaction, __________ mol of CO 2 are produced. A) 1.5 B) 3.0 C) 5.0 D) 6.0 E) 2.5 Answer: A 13) For the reaction 2H 2 + O 2 → 2H 2 O, how many grams of water are produced from 6.00 mol of hydrogen? A) 2.00 g B) 6.00 g C) 54.0 g D) 108 g Answer: D 14) For the reaction CH 4 + 2O 2 → CO 2 + 2H 2 O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane? A) 6.23 mol
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A mole ratio B percent yield C Avogadro yield D excess...

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