Respuesta :

0ne mole of CuSO4.5H2O contains 6.023×10^23 no.of molecules

Again, 1 mole CuSO4.5H2O contains 9 oxygen atoms

Therefore,1 mole CuSO4.5H2O contains 9 × 6.023×10^23 no.of oxygen atoms

Hope this help!