How many atoms of hydrogen are in 24.4 g of methane?

The number of atom is 3.67*10^24 atoms

Explanation:

Molar mass of methane CH4 is 16.0g/mol

Using this to divide the mass

24.4g/16.0 = 1.525mol

1 mol CH4 contains 1 mol of Carbon C and 4 mol of hydrogen H, so 1.525mol contains 4 (1.525) = 6.1 molH

Using avogadro number : (6.1mol) (6.02*10^23)

= 3.67*10^24 atoms