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One mole of H2O means:

i. 18 g of H2O

ii. 6.022 x 1023 molecules of H2O

iii. 180 g of H2O

iv. 1.8 of H2O

A. Both i and ii are correct

B. Both ii and iii are correct

C. Only i is correct

D. Both iii and iv are correct

1 Answer

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18 g of H2O:

Number of moles = \(\frac{Mass}{Molar\,mass}\)

Number of moles = \(\frac{18g}{18\,g/mol}\)

⇒ Number of moles = 1

6.022 x 1023 molecules of H2O:

We know that 1 mole contains 6.022 x 1023 molecules.

Thus, option A is correct.

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