A sample of gas weighing 0.0286g occupies a volume of 50 cc at 76 cm hg and 25 degree centigrade,what is the molar mass of the gas?

According to ideal gas equationpV = nRTpV = W2M2 × RTM2 =W2pV × RT        = 0.02861 × 0.05   × 0.0821 ×298    (since the pressure = 76 cm =1 atm and Volume = 50 cc =0 .05 L)       = 13.99 g

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