Question

56 g of gas occupies 112 cm3 at ntp. The molecular mass is

Answer 1

Answer:

1mole of gas occupies 22.4 litres.  

and the weight of 1 mole of gas in grams is the same as the molecular mass.  

so you have 0.28 / 22.4 moles of gas and it weighs 0.56 ( 280 cm^3 -> 0.28 Litre)  

so multiply by 22.4 / 0.28 to get the weight of 1 mole of gas  

ie 0.56 * 22.4 / 0.28 = 44.8

Explanation: