Question

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

Answer 1

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.