First slide

Numericals involving moles and volume of gas at STP

Question

Which one of the following gas occupies minimum volume at STP ?

Easy

A

2 grams of methane
B

4 grams of hydrogen
C

16 grams of oxygen
D

7 grams of nitrogen

Solution

At STP,
One mole of every gas occupies 22.4 litres;
Volume occupied by each of these gases is
$V_{{CH}_{4}} = \frac{2 \times 22.4}{16} lit; V_{H_{2}} = \frac{4 \times 22.4}{2} lit; V_{O_{2}} = \frac{16 \times 22.4}{32} lit; V_{N_{2}} = \frac{7 \times 22.4}{28} lit;$

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