The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.94 gram sample of the mixture is heated until the creation of oxygen gas stops. If the sample mass after heating is 7.54 grams, what is the percent by mass of potassium chlorate in the mixture? Report your answer with 3 significant figures.

Introductory Chemistry: An Active Learning Approach
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ISBN:9781305079250
Author:Mark S. Cracolice, Ed Peters
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Chapter3: Measurement And Chemical Calculations
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Problem 64E: Exactly 1 liter of a solution contains 31.4 grams of a certain dissolved substance. What mass in...
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The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.94 gram sample of the mixture is heated until the creation of oxygen gas stops. If the sample mass after heating is 7.54 grams, what is the percent by mass of potassium chlorate in the mixture? Report your answer with 3 significant figures. 

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