A Solution Is 40

Multiple Choice

A solution is 40.00% by volume benzene (C₆H₆) in carbon tetrachloride at 20°C. The vapor pressure of pure benzene at this temperature is 74.61 mmHg and its density is 0.87865 g/cm³; the vapor pressure of pure carbon tetrachloride is 91.32 mmHg and its density is 1.5940 g/cm³. If this solution is ideal, its total vapor pressure at 20°C is

A) 84.64 mmHg.
B) 84.30 mmHg.
C) 82.96 mmHg.
D) 81.63 mmHg.
E) 165.93 mmHg.