Find the Number of Moles

[smashtheball]

Homework Statement

Gas is contained in an 7.71 liter vessel at a temperature of 18.6oC and a pressure of 8.35 atm. Determine the number of moles of gas in the vessel.

Homework Equations

1 mol= 6.03 x 10^23

# of moles= mass of the gas/molecular mass

The Attempt at a Solution

I converted Liters to grams, which would make it 7,710 grams, but I'm not sure how to find the molecular mass of the gas, when just given the temperature and the pressure.

 

[dacruick]

welcome to PF!

Right now you have a volume, a temperature, and a pressure, and you want to find number of moles. is it possible that you are overseeing a formula?

 

[smashtheball]

oh, the Ideal gas law!