Question
What is the volume of 32 g of gas (having a molar mass of 64), at STP? [Ans. 11.2 L]
Answer
Step 1: Calculation of Number of moles
Number of moles = mass \over molar\ mass
= 32 \over 64 = 0.5 mol
Step 2: Calculation of volume
At STP, the molar volume of an ideal gas is 22.4 L/mol.
Therefore, the volume of 0.5 mol of the gas at STP is:
volume = moles × molar volume
= 0.5 × 22.4 = 11.2 L
