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An evacuted glass vessel weight 40.0g wh...

An evacuted glass vessel weight 40.0g when empty, 135. g when filled with a liquid of density `0.95 gmL^(-1)` and `40.5g` when filled with an ideal gas at 0.82 atm at 250 K. The molar mass of the gass in g `mol^(-1)` is :
(Given : R =0.082 L atm `K^(-1) mol^(-1)`)

A

35

B

50

C

75

D

125

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