Question

0.5 mole of CuSO4 contains ______ O atoms

Answer 1

In 1 mole of CuSO4 contains 4mole of O -atoms

So, 0.5 mole of CuSO4 contains 4 × 0.5 =2 moles O-atoms

e.g no of O-atoms contains in CuSO4 = 2× 6.023 × 10²³
=1.2046 × 10²⁴