Question

- Density of a gas STP is 1.43 g L-1. What is
molecular weight
(1) 16 (2) 32
(3) 48 (4) 64

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Answer 1

Answer:

32.032

Explanation:

The molecular weight should be 32.032 gms.

Because if 1.43 gms of gas is present in a volume of 1 litre, then 32.032 gms (Since 1.43 x 22.4 = 32.032) of gas should be present in volume of 22.4 litre.

1 mole of a gas is 22.4 litres. Hence 1 mole of gas contains 32.032 gms. Which means 32.032gms is molecular weight of the gas.