Methane collected over water occupies at

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

Methane collected over water occupies

500.\,\text{mL}

at

20^{\circ}\text{C}

. The barometric pressure is

740\,\text{mmHg}

, and the vapor pressure of water at

20^{\circ}\text{C}

is

18\,\text{mmHg}

. What is the mass of methane in the sample? (a)

0.339\,\text{g}

(b)

0.317\,\text{g}

(c)

0.277\,\text{g}

(d)

0.325\,\text{g}

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