10 moles of H₂O contains ?

100 moles of bonds

100 moles of electrons

30 atoms

40 moles of hydrogen bonds

Each molecule of water (H₂O) has 10 electrons (2 from hydrogen and 8 from oxygen).

Therefore, 1 mole of water has 10 moles of electrons.

So, 10 moles of water have 10 x 10 = 100 moles of electrons.