**Question:**

Density of a gas is found to be $5.46 \mathrm{~g} / \mathrm{dm}^{3}$ at $27^{\circ} \mathrm{C}$ at 2 bar pressure. What will be its density at STP?

**Solution:**

Given,

The density (*d*2) of the gas at STP can be calculated using the equation,

Hence, the density of the gas at STP will be 3 g dm–3.