Question: Heating solid sodium chlorate with manganese dioxide catalyst produces solid sodium chloride and oxygen gas. If 245 mL of wet oxygen are collected over water

Heating solid sodium chlorate with manganese dioxide catalyst produces solid sodium chloride and oxygen gas. If 245 mL of wet oxygen are collected over water at 25 °C and 754 mm Hg, what mass of sodium chlorate was decomposed? The vapor pressure of water at 25 °C is 24 mm Hg.

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