Question: An empty cylindrical canister 1.50 m long and 90.0 cm in diameter is to be filled with pure oxygen at 22.0C to store in a

An empty cylindrical canister 1.50 m long and 90.0 cm in diameter is to be filled with pure oxygen at 22.0°C to store in a space station. To hold as much gas as possible, the absolute pressure of the oxygen will be 21.0 atm. The molar mass of oxygen is 32.0 g/mol
(a) How many moles of oxygen does this canister hold?
(b) For someone lifting this canister, by how many kilograms does this gas increase the mass to be lifted?

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