# Physics

posted by Catie

1.9 mol of gas at a temperature of -180 C fills a 3.4 L container.

What is the gas pressure?

Never been good at physics or mol stuff, how do you set it up?

1. drwls

Use the ideal gas formula:

P V = n R T

T has to be in Kelvin degrees, which would be 93 K.
n = 1.9 moles
V = 3.4 liters
R = 0.0821 atm*L/mole*K is the "gas constant"

Solve for P in atmospheres

2. Catie

Thank you! That really helped!

3. drwls

You're welcome. Remembering the formula is easy, but I always have to look up the value of R.

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