What is the number of $\mathrm{CO}_2$ molecules in 45.42 litre at STP? (Consider molar volume of gas at STP…

What is the number of $\mathrm{CO}_2$ molecules in 45.42 litre at STP? (Consider molar volume of gas at STP $=22.71 \mathrm{~L} \mathrm{~mol}^{-1}$ )
  1. $0.913 \times 10^{24}$
  2. $1.806 \times 10^{24}$
  3. $1.501 \times 10^{24}$
  4. $1.204 \times 10^{24}$

Solution

$\text { Number of moles }=\frac{45.42}{22.71}=2$ or $2 \times 6.02 \times 10^{23}=1.204 \times 10^{24}$ molecules

Asked in: MHT CET 2022 (11 Aug Shift 1)

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