- #1

Qube

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## Homework Statement

A mixture of He, Ne, and Ar has a total pressure of 0.80 atm and is found to contain 0.55 mol He, 0.94 mol Ne, and 0.35 mol Ar. What is the partial pressure of each gas in atm?

## Homework Equations

Partial pressure for a gas is equal to the mole fraction of the gas multiplied by the total pressure.

## The Attempt at a Solution

The total moles of gases: 0.55 + 0.94 + 0.35 = 1.84 moles.

Helium has a mole fraction of .55/1.84 or 29.89%.

29.89% of 0.80 atm is 0.239 atm.

Neon has a mole percent of 51.08%. It therefore has a partial pressure of 0.4086 atm.

Argon has a partial pressure of 0.152 atm.

However, my answers are incorrect according to the key.

What gives?