Question

calculate the number of H2 atom in 0.5 mol ch4

Answer 1

Hello!

Since,
1 molecule CH₄ contains 4 atoms H 

∴ 1 mol of CH₄ contains 4 mol H-atoms 

Then,

0. 5 mol CH₄ will contains 0.5 × 4 = 2 mol H-atoms 

Cheers!