Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
8. How many grams of potassium chloride are produced by decomposing 118 grams of potassium chlorate ?
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Stoichiometry Practice Problems-1
Directions: On another sheet of paper, complete the following problems. Show ALL work
the CORRECT way, circle final answer, be neat, and remember sig. figs.
1. How many moles of oxygen would be required to react with calcium to
produce 8 moles of calcium oxide?
2. Şodium Carbonate reacts with nitric acid to produce sodium nitrate,
carbon dioxide, and water. How many moles of Sodium carbonate are
required to produce 100.0 grams of sodium nitrate?
3. By using the same equation in #0, if 7.50 grams of sodium carbonate
reacts, how many moles of carbon dioxide are produced?
CO 2
4. Methane gas, CH4, burns in air to produce carbon dioxide and water.
What mass of water is produced by burning 500. grams of methane?
5. Hydrogen peroxide breaks down releasing oxygen gas and water. What
mass of oxygen is produced when 1.840 moles of hydrogen peroxide
decompose?
6. By using the same equation in #4, what mass of water is produced when
5.0 moles of oxygen is produced by this reaction?
7. Chlorine gas, water, and Manganese (II) chloride can be produced in the
lab by adding concentrated hydrochloric acid to Manganese (IV) oxide.
Calculate the mass of Manganese (IV) oxide needed to produce 25.0
grams of chlorine gas.
8. How many grams of potassium chloride are produced by decomposing
118 grams of potassium chlorate?
9. How many moles of potassium metal would be needed to react with
Fluorine gas to make 800 grams of potassium fluoride.
10. Magnesium burns in air to produce magnesium oxide. What mass of
magnesium will burn in the presence of 189 mL of oxygen? The density of
oxygen is 1.429 g/L.
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