Chapter 3.1-3.5 Review packet Balancing and Stoichiometry

# A they are inflated as a result of a decomposition

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a. They are inflated as a result of a decomposition reaction b. They are loaded with sodium azide initially c. The gas used for inflating them is oxygen d. The two products of the decomposition reaction are sodium and nitrogen e. A gas is produced when the air bag activates. 12. Lime, also known as quicklime, has the formula ____________. a. La(NO 3 ) 3 b. CaO c. CaCO 3 d. LiCl e. NaCl 13. The balanced equation for the decomposition of sodium azide is ____________. a. 2NaN 3 (s) 2Na(s) + 3N 2 (g) b. 2NaN 3 (s) --> Na 2 (s) + 3N 2 (g) c. NaN 3 (s) --> Na(s) + N 2 (g) d. NaN 3 (s) --> Na(s) + N 2 (g) + N(g) e. 2NaN 3 (s) --> 2Na(s) + 2N 2 (g)

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14. The reaction used to inflate automobile airbags ____________. a. produces sodium gas b. is a combustion reaction c. is a combination reaction d. violates the law of conservation of mass e. is a decomposition reaction 15. Which of the following are combination reactions? 1) CH 4 (g) + O 2 (g) --> CO 2 (g) + H 2 O(l) 2) CaO(s) + CO 2 (g) --> CaCO 3 (s) 3) Mg(s) + O 2 (g) --> MgO(s) 4) PbCO 3 (s) --> PbO(s) + CO 2 (g) a. 1, 2, and 3 b. 2 and 3 c. 1, 2, 3, and 4 d. 4 only e. 2, 3, and 4 16. Which of the following are combustion reactions? 1) CH 4 (g) + O 2 (g) --> CO 2 (g) + H 2 O(l) 2) CaO(s) + Co 2 (g) --> CaCO 3 (s) 3) PbCO 3 (s) --> PbO(s) + CO 2 (g) 4) CH 3 OH(l) + O 2 (g) --> CO 2 (g) + H 2 O(l) a. 1 and 4 b. 1, 2, 3, and 4 c. 1, 3, and 4 d. 2, 3, and 4 e. 3 and 4 17. Knowing that sodium reacts with water to form sodium hydroxide and hydrogen gas, you may reasonably predict that ____________. a. sodium will react with hydrogen gas to form sodium hydride b. potassium will react with water to form potassium hydroxide and hydrogen gas c. potassium will react with sodium d. sodium will react with water to form sodium hydride e. sodium hydroxide will react with water to form sodium oxide 18. Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? a.
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a They are inflated as a result of a decomposition reaction...

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