A Sample of Methane Gas (CH₄)was Collected by Displacement of Water

Multiple Choice

A sample of methane gas (CH₄) was collected by displacement of water in a gas collection flask. The total pressure in the collection flask was measured as 758.2 torr, the temperature was 25.0 °C, and the measured volume of gas in the flask was 526.0 mL. How many grams should the methane weigh? (At 25.0 °C, the vapor pressure of water is 23.8 torr.)

A) 0.01080 g
B) 0.3333 g
C) 0.3441 g
D) 0.3549 g
E) 8.438 g