Calcium perbromate, Ca(BrO4)2 (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas according to the equation below. A sample containing Ca(BrO4)2 is heated and the gas produced collected by downward displacement of water at 50.0°C. The total volume of gas collected was 438.0 ml at an atmospheric pressure of 680 torr. The vapor pressure of water at 50.0°C is 92.5 torr.
Ca(BrO4)2 (s) → CaBr2 (s) + 4 O2 (g)
a.) Calculate the number of grams of Ca(BrO 4)2 in the original sample.
b.) Calculate the mole fraction of oxygen in the collected gas mixture