Final answer:
Partial pressure is the pressure that a gas in a mixture would exert if it were alone in a container. Dalton's Law states that the total pressure of a gas mixture is the sum of the partial pressures of each gas. You can calculate a gas's partial pressure by multiplying its mole fraction by the total pressure.
Step-by-step explanation:
The partial pressure of a gas is the pressure that the gas would exert if it were alone in a container. In a mixture of gases, each gas contributes to the total pressure in proportion to its abundance, in accordance with Dalton's Law of Partial Pressures. To determine the partial pressures of gases in a mixture, you can use the mole fraction of each gas. This is the ratio of the number of moles of a particular gas to the total number of moles of all gases in the mixture. The partial pressure is then found by multiplying the mole fraction by the total pressure of the gas mixture.
To find the total pressure in atmospheres, simply sum the partial pressures of each gas present in the mixture. The sum of these partial pressures gives you the total pressure exerted by the gas mixture