Question

Calculate the weights of 5.6 litre of Cl2 gas at STP.
​

Answer 1

Answer:

Explanation:

At S.T.P. 1 mole of a gas occupies a volume of 22.4 liters. Its mass will be equal to its molar mass.

The weight of 5.6 liters of a gas at S.T.P is 11 grams.

The weight of 22.4 litres of a gas at S.T.P will be 44 grams,

11g×  

5.6

22.4

​  

=44g

The molar mass of nitrous oxide

(N  

2

​  

O) is 14+14+16=44g/mol.

Hence, the gas is  nitrous oxide

(N  

2

​  

O).

Note: The molecular weight of phosphine PH  

3

​  

, phosgene COCl  

2

​  

 and nitric oxide NO

are  34 g/mol, 99 g/mol and 30 g/mol respectively.