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When heated, KClO3 decomposes into KCl and O2.If this reaction produced 43.8 g of KCl, how...

When heated, KClO3 decomposes into KCl and O2.If this reaction produced 43.8 g of KCl, how much O2 was produced (in grams)?

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Answer #1

2KClO3 ---------------------> 2 KCl +    3O2

245 g                                    149.1g      96 g

                                             43.8           ?

149.1 g KCl -------------------> 96 g O2

43.8 g KCl ---------------------> x g O2

x = 43.8 x 96 / 149.1

x = 28.2 g

mass of O2 produced = 28.2 g

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