Find the number of moles of oxygen atoms present in 1.2×1026 atoms of oxygen. (Given: NA=6×1023)
If the total number of electrons present in a pure sample of FeSO4.7H2O is 4.336×1026 then the total number of moles of oxygen atoms present in FeSO4.7H2O:
Find the number of moles and the number of H atoms present in 9.033×1023 molecules of water.