Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).KClO3(s). The equation for the reaction is 2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2 Calculate how many grams of O2(g)O2(g) can be produced from heating 43.8 grams43.8 grams of KClO3(s).KClO3(s). STRATEGY Convert the mass of KClO3KClO3 to moles. Convert the number of moles of KClO3KClO3 to the number of moles of O2.O2. Convert the number of moles of O2O2 to grams. Step 1: 43.8 g43.8 g of KClO3KClO3 is equal to 0.3570.357 mol KClO3.KClO3. Step 2: 0.357 mol0.357 mol KClO3KClO3 corresponds to 0.536 mol 0.536 mol O2.O2. Step 3: Convert 0.536 mol0.536 mol O2O2 to grams.
Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).KClO3(s). The equation for the reaction is 2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2 Calculate how many grams of O2(g)O2(g) can be produced from heating 43.8 grams43.8 grams of KClO3(s).KClO3(s). STRATEGY Convert the mass of KClO3KClO3 to moles. Convert the number of moles of KClO3KClO3 to the number of moles of O2.O2. Convert the number of moles of O2O2 to grams. Step 1: 43.8 g43.8 g of KClO3KClO3 is equal to 0.3570.357 mol KClO3.KClO3. Step 2: 0.357 mol0.357 mol KClO3KClO3 corresponds to 0.536 mol 0.536 mol O2.O2. Step 3: Convert 0.536 mol0.536 mol O2O2 to grams.
Introductory Chemistry: A Foundation
8th Edition
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter9: Chemical Quantities
Section: Chapter Questions
Problem 34QAP: Small quantities of oxygen gas can be generated in the laboratory by the decomposition of hydrogen...
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Question
Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).KClO3(s).
The equation for the reaction is
2KClO3⟶2KCl+3O22KClO3⟶2KCl+3O2
Calculate how many grams of O2(g)O2(g) can be produced from heating 43.8 grams43.8 grams of KClO3(s).KClO3(s).
STRATEGY
- Convert the mass of KClO3KClO3 to moles.
- Convert the number of moles of KClO3KClO3 to the number of moles of O2.O2.
- Convert the number of moles of O2O2 to grams.
Step 1: 43.8 g43.8 g of KClO3KClO3 is equal to 0.3570.357 mol KClO3.KClO3.
Step 2: 0.357 mol0.357 mol KClO3KClO3 corresponds to 0.536 mol 0.536 mol O2.O2.
Step 3: Convert 0.536 mol0.536 mol O2O2 to grams.
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