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Answer 1 · 2016-11-09T16:56:36

The density of the gas at given temperature and pressure

$="mass of gas"/"volume of the gas"=3.45/1.85" g/L"=1.865" g/L"$

By equation of state for ideal gas we know

$PV=w/MRT$

Where

$P->"pressure"=1.05atm$

$V->"volume"=1.85L$

$T->"temperature"=49+273=322K$

$R->"ideal gas constant"=0.082LatmK^-1mol^-1$

$M->"molar mass of the gas"=?$

$M=(wRT)/(PV)=(3.45xx0.082xx322)/(1.05xx1.85)=46.9gmol^-1$