The Concentration of Ozone in a Sample of Air That

The concentration of ozone in a sample of air that has a partial pressure of O₃ of 0.53 torr and a total pressure of air of 695 torr is ________ ppm.

A) 7.6 × 10²
B) 0.76
C) 0.076
D) 1.3 × 10^-3
E) 1.3