During the Decomposition of KClO₃(s) into KCl(s) and O₂(g), 100 $\degree$

question 102

Multiple Choice

During the decomposition of KClO₃(s) into KCl(s) and O₂(g) , 100.0 mL of gas is collected by the displacement of water in a flask at 25 $\degree$ C with an atmospheric pressure of 755 mmHg.The vapor pressure of water at this temperature is 23.8 mmHg.What mass of O₂ is collected?

• A)0.679 mg
• B)21.7 mg
• C)12.9 mg
• D)0.807 mg
• E)126 mg

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