The composition of earths dry atmosphere is $78.8% N_2$ , $21.0% O_2$ , and $1.00% Ar$ . Using the atospheric pressure recorded, which was 763 mm Hg with and an ambient temperature of 25 C, how do you calculate the partial pressures of these three gases?

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Answer 1 · 2016-08-14T05:57:07

The partial pressure of each gas is simply the individual percentage of the measured pressure.

And thus $P_"dinitrogen"$ $=$ $78.8%xx763*mm*Hg$ .

And $P_"dioxygen"$ $=$ $21.0%xx763*mm*Hg$ .........etc.

And the sum of the individual partial pressures is necessarily the overall pressure, $P=763*mm*Hg$

The composition of earths dry atmosphere is 78.8% N_278.8% N_2, 21.0% O_221.0% O_2, and 1.00% Ar1.00% Ar. Using the atospheric pressure recorded, which was 763 mm Hg with and an ambient temperature of 25 C, how do you calculate the partial pressures of these three gases?