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In the middle of a horizontally positioned cylinder of length is a piston of ?=60 ??mass...

In the middle of a horizontally positioned cylinder of length is a piston of ?=60 ??mass The lower part of the tube is filled with of and m=20 ??.?2?1=80 ???2 the upper part of the tube is filled with . The temperature of both gasses is 300K. ?2 Find the mass of the gas.?2 (Doesn't have diagram)

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