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review 8 - and aqueous carbon dioxide are reacted If 68.2 g...

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Chapter 8 Review Problems 1. 3.25 mol of solid magnesium are reacted with 1.82 mol of aqueous hydrochloric acid to form aqueous magnesium chloride and hydrogen gas. How many moles of hydrogen gas are formed? What is the limiting reactant? 2. 25.4 g of solid aluminum are reacted with 225 ml of 1.57 M sulfuric acid solution to form aqueous aluminum sulfate and hydrogen gas. How many grams of hydrogen gas are formed? What is the limiting reactant? 3. 25.7 g of nitrogen gas are reacted with 32.2 g of oxygen gas to form nitrogen monoxide gas. 22.5 g of nitrogen monoxide gas was obtained from this reaction. What is the limiting reactant, theoretical yield and percent yield? 4. How many grams of bromine liquid are needed to completely react with 14.8 g of hydrogen gas to form hydrogen bromide gas? 5. If the world burns 7 X 10 12 kg of octane [C 8 H 18 (l)] per year, how many kg of carbon dioxide are produced per year? 6. Aqueous urea (CH 4 N 2 O) and liquid water are synthesized when aqueous ammonia
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Unformatted text preview: and aqueous carbon dioxide are reacted. If 68.2 g of ammonia are reacted with 105 g of carbon dioxide, 87.5 g of urea are produced. What is the limiting reactant, theoretical yield and percent yield? 7. In the generic chemical equation: A + B C, 25 g of A were reacted with 8 g of B. A was completely used up and 4 g of B remained. What was the limiting reactant? 8. Solid calcium carbonate is dissolved by aqueous hydrochloric acid. If 5.8 g of hydrochloric acid are used, how much calcium carbonate was used in the reaction? 9. In the generic chemical equation: 2A + B 3C, ∆ H = 240 kJ. If 3 mol A and 2.5 mol B are reacted, what is the limiting reactant? What is the heat associated with this reaction? 10. Identify the processes below as either endothermic or exothermic: a. Ice melting b. Gasoline burning c. The reaction that occurs in a chemical cold pack often used to ice athletic injuries...
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