Agas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). if the partial pressure of argon is 200. torr, what is the pressure of methane, in torr? hint: what is the mole fraction of each gas?

The partial pressure of the methane is 500 Torr.

Mole fraction of methane is 0.7142 and mole fraction of argon is 0.2857.

Explanation:

Equal masses of methane and argon. Suppose 1 gram of methane and argon.

Moles of methane =

Moles of argon =

Mole fraction of methane =

Mole fraction of argon=

Total pressure of the gases = P

Let the partial pressure methane and argon be .

According Dalton's law of partial pressure :

P = 700 Torr

The partial pressure of the methane is 500 Torr.

Mole fraction of methane is 0.7142 and mole fraction of argon is 0.2857.

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