Calculate the number of molecules in 1 kg of sodium chloride. [Na =23, C, = 35.5].

Explanation

(a) 1 mol. Wt. of NaCl = 58.5 g contains `6.022 xx 10^(23)`
(b) Contains molecules `=1000/58.5 xx 6.023 xx 10^(23) = 102.96 xx 10^(23)` molecules.