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1.34    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 STP) of this welding gas is found to weigh 11.6 g. Calculate

 (ii) molar mass of the gas

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Wight of 10 Litres of the gas at S.T.P. is 11.6g

Weight of 22.4 Litres of gas at S.T.P. will be:

= \frac{11.6g}{10.0L}\times22.4L

= 25.984\ g\ mol^{-1}

\approx 26\ g\ mol^{-1}

Posted by

Divya Prakash Singh

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