Chemistry

Problem

A mixture of four ideal gases A, B, C, and D in a closed container at

298\,\text{K}

exerts a total pressure of

780\,\text{mmHg}

. The partial pressures (in mmHg) are given by

P_A = 2x

P_B = x + 100

P_C = 180

P_D = 120

. If the mole fraction of gas A is 0.40, what is the mole fraction of gas B? a)

0.60

0.33

0.29

0.45