A Mixture of KCl and KClO₃ Weighing 1

question 71

Multiple Choice

A mixture of KCl and KClO₃ weighing 1.34 grams was heated; the dry O₂ generated occupied 143 mL at STP.What percent by mass of the original mixture was KClO₃,which decomposes as follows:

• A) 38.9%
• B) 58.4%
• C) 87.6%
• D) 10.7%
• E) 23.7%

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