Question

If 1dm^3 of gas weights 2.5g at STP its gram molecular weight is​

Answer 1

Answer:

It is given that 1 litres gas weighs 2.5 g

So 22.4 litre weighs = 56 grams

The molecular weight of the gas is 56 g/mol.

Hope it helps.

Answer 2

Answer:

The molecular weight is 56 g.

Explanation:

Given that 1 $dm^{3}$ of gas weights 2.5 g at STP. We have to find the molecular weight of the gas.

Given volume = 1 $dm^{3}$

We know that 1 $dm^{3}$= 1 L

Therefore 1 L weights 2.5 g

1 mole of any gas occupies 22.4 L at STP.

So 22.4 L weights 22.4 × 2.5 = 56 g

Therefore, the molecular weight is 56 g.