1.

The mass of 11.2 litres of a certain gas at s.t p. is 24 g. Find the gram molecular mass of the gas.

Answer»

Mass of gas = 24 g 

Volume of gas = 11.6 litres 

22.4 L of gas at STP = 1 mole 

11.2 L of gas at STP = 11.2 / 22.4 = 0.5 moles 

Mass of 0.5 moles of gas =24 g 

Mass of 1 mole of gas or molar mass = 24/0.5 = 48 g



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