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Mole Concept

What is the v...

Question

What is the volume occupied by 20 g of oxygen (in litres) at STP?
14

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Solution

The correct option is A 14
Gram molecular mass of oxygen ( $O_{2}$ ) is 32 g, which is equal to the mass of one mole of oxygen.

At STP, the volume occupied by one mole of a gas is 22.4 litres.

Thus, 32 g of oxygen gas occupies 22.4 litres

Hence, the volume occupied by 20 g of oxygen at STP = $\frac{20 \times 22.4}{32}$ = 14 litres

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