Answer

1 mole of a substance = 1 gram atom

 

In this case

H 2 S has 2 H atoms and 1 S atom

 

1 mole of H 2 S → 2 gram atoms of H and 1 gram atom of S

 

So, 0.4 moles of H 2 S →

2 x 0.4 = 0.8 gram atoms of H

1 x 0.4 = 0.4 gram atoms of S

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo