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

question 2

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 15.0 g of potassium chlorate decomposes.

• A)11.7 g
• B)57.5 g
• C)173 g
• D)5.88 g
• E)86.1 g