A sample of air from a home is found to contain 7.2 ppm of carbon monoxide. This means that if the total pressure is 695 torr, then the partial pressure of CO is ________ torr.

Question

Quizplus · Accepted Answer

ppm means parts per million. So, 7.2 ppm of CO means that there are 7.2 parts of CO for every million parts of air. The total pressure is 695 torr, so the partial pressure of CO is:(7.2 ppm / 1,000,000 ppm) * 695 torr = 5.0 * 10^-3 torr

A Sample of Air from a Home Is Found to Contain