Small Amounts of Oxygen Gas Can Be Produced for Laboratory $\rightarrow$

question 106

Multiple Choice

Small amounts of oxygen gas can be produced for laboratory use by heating potassium chlorate, which causes it to decompose by the following reaction: ___KClO₃(s) $\rightarrow$ _{____}KCl(s) + ___O₂(g) (unbalanced) Balance the equation, and determine the mass of oxygen that should be formed if 10.0 g of potassium chlorate decomposes.

• A)7.83 g
• B)115 g
• C)3.92 g
• D)38.3 g
• E)57.4 g

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