A mixture of helium, nitrogen, and oxygen has a total pressure of 752 mm Hg. The
partial pressures of helium and nitrogen are 234 mm Hg and 197 mm Hg, respectively.
What is the partial pressure of oxygen in the mixture?

The partial pressure of oxygen in the mixture is 321 mm Hg

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

Given : = total pressure of gases = 752 mm Hg

= partial pressure of Helium = 234 mm Hg

= partial pressure of nitrogen = 197 mm Hg

= partial pressure of oxygen = ?

Putting in the values we get:

The partial pressure of oxygen in the mixture is 321 mm Hg

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).