A mixture of KCl and KClO3 weighing 1.80 g was heated; the dry O2 generated occupied 1.40 × 102 mL at STP. What percent of the original mixture was KClO3? KClO3 decomposes as follows:
2KClO3(s) → 2KCl(s) + 3O2(g)
A) 37.2%
B) 72.6%
C) 42.6%
D) 63.8%
E) 28.4%
Correct Answer:
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