Q1 / 150 · MHT CET 2026 (11 April Shift 2) · Chemistry
Calculate the volume of $99$ g of $\text{CO}_2$ at STP ?
- A$22.4$ L
- Correct answerB$50.4$ L
- C$67.2$ L
- D$89.6$ L
Solution
Molar mass of $\text{CO}_2 = 12 + 2 \times 16 = 44 \text{ g/mol}$
Number of moles of $\text{CO}_2 = \dfrac{99}{44} = 2.25 \text{ moles}$
Volume of $1 \text{ mole}$ of a gas at STP $= 22.4 \text{ L}$
Volume of $2.25 \text{ moles}$ of $\text{CO}_2 = 2.25 \times 22.4 = 50.4 \text{ L}$
Answer: $50.4$ L
Number of moles of $\text{CO}_2 = \dfrac{99}{44} = 2.25 \text{ moles}$
Volume of $1 \text{ mole}$ of a gas at STP $= 22.4 \text{ L}$
Volume of $2.25 \text{ moles}$ of $\text{CO}_2 = 2.25 \times 22.4 = 50.4 \text{ L}$
Answer: $50.4$ L
Hence, the correct answer is option: 'B'.