How many moles are present in 18 g of water (H₂O)?

Q. How many moles are present in 18 g of water (H₂O)?
Answer: 1 mole
Notes: Molar mass of H₂O is 18 g/mol. Therefore, 18 g of water equals 1 mole, which contains 6.022 × 10²³ molecules, based on Avogadro's number.

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