Question

What is the mass of 0.2 mole of oxygen atoms ?

Answer 1

Given mass of oxygen =  0.2 moles

Gram atomic mass of oxygen atom = 16g

Therefore, 16g of oxygen atoms = 1 mole of oxygen atoms

So, 0.2 moles of oxygen atoms = 16 × 0.2g of oxygen atoms

Hence, 0.2 moles of oxygen atoms weigh 3.2g.