0.465 g sample of an unknown compound occupies 245 mL at 298K and 1.22 atm. What is the molar mass of the unknown compound?
The molar mass of the gas is 38.0 g/mol.
One way to solve this problem is to use the Ideal Gas Law.
The relative molar mass is 38.0 g/mol.
So 0.0121 moles weigh 0.465g
So 1 mole weighs
nb I converted to Pa and used 8.31 for R. It depends which R value you are given.