Question

What is numbers of molecules in 36 g of water

Answer 1

⇒The molecular weight of H2O = 18

⇒Thus, 18 grams of H2O = 1 mol of H2O

⇒36 grams of H2O = 2 mol of H2O

⇒1 mol of H2O = 6.023* 10^23 molecules of H2O

⇒2 mol of H2O = 2*6.023*10^23 molecules of H2O

⇒ 12.046 * 10^23 molecules of H2O

Answer 2

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