Question

Which of the following does not occupy a volume of 4.48 L at S.T.P. ?
(a) 0.2 mol of 11
(b) 12.8 g of S02
(c) 3.2 g of O2
(d)800 mg of He​

Answer 1

Answer:

4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be CO

2

At STP, 1 mole of any gas occupies a volume of 22.4 L.

4.4 g of a gas at STP occupies a volume of 2.24 L.

Hence, the number of moles of gas =

22.4

2.24

=0.1 moles.

0.1 moles of a gas = 4.4 g.

1 mole of a gas =4.4×

0.1

1

=44 g.

Thus, the molecular weight of gas is 44 g/mol. It is the molecular weight of CO

2

gas