posted by Kat .
The gaseous product of a reaction is collected in a 30.0 L container at 37 degrees C. The pressure in the container is 2.5 atm and the gas has a mass of 85.0 grams. What is the molar mass of this gas?
I know the correct answer is 28.8 g/mol but I need to know how to get the answer and which gas law you would use?
Use PV = nRT and solve for n = number of mols of gas. Don't forget T must be in kelvin. Then n = grams/molar mass. You know grams and n, solve for molar mass.