Unit 9 Review Problems
1. Upon the addition of heat to an unknown amount of KClO3, 0.96 grams of oxygen were liberated. How much KClO3 was present? (Hint: The decomposition of KClO3 makes oxygen gas and potassium chloride.) (Answer: 2.5 grams)
2. Determine the maximum
amount of carbon dioxide that can be produced from the combustion of 104 grams
of acetylene (C2H2) with 84.3 grams of oxygen.
3. Silver bromide, AgBr, used in photography, may be prepared from AgNO3
Calculate the weight of each reactant needed to make 2,500 grams of AgBr.
(Answers: AgNO3 = 2261 g rounded to 2300 g & NaBr = 1370 g rounded to 1400 g)
__ AgNO3 + __ NaBr à __ AgBr + __ NaNO3
4. What is the maximum weight of SO3
that could be made from 25.0 grams of SO2 and 6.00 grams of O2
by the following reaction? (Answer: 30.0 grams)