A 10.0 L tank holds helium gas at 82 C and 1.70 atm.
What mass of helium gas is in the tank?
Use PV = nRT and solve for n. Don't forget to convert T to Kelvin.
Then n = grams/molar mass
Solve for grams.
What mass of helium gas is in the tank?
Then n = grams/molar mass
Solve for grams.