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The number of water molecules is maximum in:

1. 18 molecules of water
2. 1.8 gram of water
3. 18 gram of water
4. 18 moles of water

Correct answer: 18 moles of water

Solution

18 moles of water contain the highest number of molecules because 1 mole equals 6.022 × 10^23 molecules, and 18 moles multiply this value.

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