A gaseous hydrocarbon R of mass 7.0g occupies a volume of 2.24dm^3 at s.t.p.If the percentage composition by mass of hydrogen is 14.3,determine its:
1.Empirical formula
2.Molecular formula
[H=1.00,C=12.00,Molar volume of gas at s.t.p=22.4 dm^3]
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