A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. A volume of 10.0 L (measured at S.T.P.) of this welding gas is found to weigh 11.6 g. Calculate (i) empirical formula, (ii) molar mass of the gas, and (iii) molecular formula.
i) The empirical formula of the welding fuel gas is CH.
ii) Molar mass of the gas =26g/mol
iii) The molecular formula is 2(CH)=C2H2