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Question Q147) The total number of electrons in 2.0 g of D2O to that in 1.8 g of H2O



SOLUTION

Both atoms D2O and H2O have same number of electron
Molecular weight of D2O = 20g
Molecular weight of H2O =18 g
Thus total number of electrons in 2.0 g of D2O to that in 1.8 g of H2O are same as number of moles are same = 0.1 mole
Each H2O have 10 electrons
Thus number of electron =1mole
Answer: (b)