A sample of air from a home is found to contain 4.3 × 10^-6 of carbon monoxide.This means that if the total pressure is 735 torr,then the partial pressure of CO is ________ torr. A) 3.2 × B) 3.2 × C) 3.2 D) 5.9 × 10³ E) 1.7 × 10⁸

Question

Quizplus · Accepted Answer

To find the partial pressure of CO, we simply multiply the given concentration by the total pressure.

Partial pressure of CO = concentration of CO x total pressure 
Partial pressure of CO = (4.3 × 10^-6)(735 torr) 
Partial pressure of CO = 3.1595 × 10^-3 torr

Rounding to two significant figures, we get 3.2 × 10^-3 torr, which corresponds to choice B.

A Sample of Air from a Home Is Found to Contain