What is the mass of Question 9 from Chapter 3. Atoms And Molecules

(a) 0.2 mole of oxygen atoms?

(b) 0.5 mole of water molecules?

Answer : Mass of atoms (m) in given moles (n) = Molar Mass of substance (M)× Given Moles of substance (n)

(a) ∴  Mass of 0.2 mole of oxygen atoms = Molar Mass of oxygen × Given Moles  =  16g × 0.2   = 3.2 g

(b)  ∴ Mass of 0.5 mole of water molecules =Molar Mass of water × Given Moles = 18 g × 0.5  = 9 g

This is an answered question from Chapter 3. Atoms And Molecules of CBSE Class 9th Science

Check for Complete Exercise Solution for Chapter 3. Atoms And Molecules | CBSE Class 9th Science