Question

find the number of atom for 48 gram ch4​

Answer 1

mass of CH4 = 48g

molecular mass of CH4 = 16

Mole = 48/16 = 3mole

one mole of an molecule contain 6 .022*10^23 atom

so

3 mole of CH4 contain = 3*6.022*10^23 = 18.066*10^23 atom .

Answer 2

Answer:

Molar mass of CH4 = 12 +4(1) = 16 g

No of atoms present in 16 g = 5 x Na

No of atoms in 48 g = 5 x Na x 48/16

= 5 x Na x 3

= 15 x 6.02 x 10²³

= 90.3 x 10²³ atoms ✔✔

Thanks ! ❤️