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what mass of a gas of molecular mass 30 occupies a volume of 80ml . at 27°C and under 3atm pressure? (R=0.082Latm/k mol) |
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Answer» The ideal GAS equation relating PRESSURE (P), volume (V), and absolute temperature (T) is given as:PV = nRTWhere, R is the universal gas CONSTANT =8.314Jmol −1 K −1 n = Number of moles = 1T = Standard temperature = 273 KP = Standard pressure = 1 atm =1.013×10 5 Nm −2 ∴V=nRT/P=1×8.314×273/(1.013×10 5 )=0.0224m 3 =22.4 litresHence, the molar volume of a gas at STP is 22.4 litres. |
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