A steel cylinder at 350 K contains He, N

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

Problem

A steel cylinder at 350 K contains

8.00\,\text{g}

He,

28.0\,\text{g}

_2

, and an unknown mass of CO

_2

. The total pressure is

3.75\,\text{atm}

, and the partial pressure of CO

_2

is measured to be

1.25\,\text{atm}

. What is the mass of CO

_2

in the cylinder? (a)

44\text{ g}

(b)

66\text{ g}

(c)

88\text{ g}

(d)

29\text{ g}