Question

20. A solution is made by dissolving sodium chloride in water and its concentration is
expressed as 0.9% mass,
Calculate (i) the number of moles, and
ii) number of molecules present in NaCl.

(Atomic mass of Na=23.0u, Cl=35.5u)​

Answer 1

Answer:

(|) the no. of moles = 6• 022*10 ki power 23

Answer 2

Answer:

Explanation:

Na=23

Cl=35.5

thus Molar mass of NaCl is 23+35.5=58.5