Question

Calculate the number of molecules in 4.25g CLNH3

Answer 1

4.25gms will have 6.023*10^23 number of atoms in it. Molar mass of ammonia is 17g . So 17g ammonia contains 6.022×10^23 number of ammonia molecules. So 4.25 g ammonia will contain (6.022×10^23×4.25)/17 = 1.5×10^23