MHT CET 2025 Chemistry question

Find the number of water molecules in 1 mL of water vapours at STP?

Answer: (D)

Solution

At STP (273 K, 1 atm) one mole of any gas occupies 22.4 L mL, and one mole contains molecules. Moles in 1 mL of vapour mol. Number of molecules $=

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Question ID VK-102104