Amixture of oxygen, hydrogen, and nitrogen exerts a total pressure of 378 kpa. if the partial pressures of oxygen and hydrogen are 212 kpa and 101 kpa respectively, what is the partial pressure exerted by nitrogen?

This can be solved using Dalton's Law of Partial pressures. This law states that the total pressure exerted by a gas mixture is equal to the sum of the partial pressure of each gas in the mixture as if it exist alone in a container. In order to solve, we need the partial pressures of the gases given. Calculations are as follows:

P = P1 + P2 + P3

378 kPa= 212 kPa + 101 kPa + P(H2)

P(H2) = 65 kPa

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