Question

The number of water molecules in 1 litre of water is _______.
(A) 18
(B) 18 × 1000
(C) N_{A}
(D) 55.55 N_{A}

Answer 1

Number of water molecules = 6.022* 10 ^23 * 1000/ 18 = 6.022 *10 ^23 * 55.55

Number of water molecules = 55. 55 N(A) (AVAGADRO NUMBER)

OPTION (D) is Correct.