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ceName___________________________________ Homework Chapter 8: Quantities in Chemical Reactions Please answer these questions on a scantron ;-) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) The primary cause of increasing greenhouse gases is: A) the increased use of natural gas, petroleum and coal. B) the release of CO2 by decreasing solubility in the ocean. C) the production of CO2 by respiration. D) the burning of vast amounts of rain forests. E) none of the above 2) Which of the below statements about global warming is FALSE? A) Greenhouse gases allow sunlight to reach and heat the earth. B) Greenhouse gases prevent heat from leaving the earth. C) If the level of greenhouse gases increases, the temperature will decrease. D) Some greenhouses gases are needed to keep the proper temperature balance. E) none of the above 3) Which of the following is TRUE? A) Stoichiometry allows prediction of the amounts of products that form in a chemical reaction based on the amounts of reactants. B) Stoichiometry allows prediction of how much of the reactants are necessary to form a given amount of product. C) Stoichiometry shows the numerical relationship between chemical quantities in a balanced chemical equation. D) All of the above are true. E) None of the above are true. 4) How many waffles can be made from 1 dozen eggs, assuming you have enough of all other ingredients? Given: 2 cups flour + 3 eggs + 1 tbs oil 4 waffles A) 12 B) 4 C) 48 D) 16 E) not enough information 5) How many eggs are needed to make 1 dozen waffles, assuming you have enough of all other ingredients? Given: 2 cups flour + 3 eggs + 1 tbs oil 4 waffles A) 9 B) 16 C) 48 D) 12 E) not enough information

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6) How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas? Given the reaction: 2H2 + O2 2H2 O A) 3.3 B) 1.1 C) 2.2 D) 4.4 E) not enough information

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