Question

What mass (in gram of air) is filled in a hot balloon when it is finflated (at 95oC) to a volume of 500 L at 1.15 atm? (The average molar mass of air is 29 g/mol)

Answer 1

Usw PV = nRT and solve for n = number of mols air.
Then n = grams/molar mass. Solve for grams. Don't forget T must be in kelvin.