Question

How to find total number of electrons in 18ml of water?

Answer 1

We know density of water is 1 gm/cc or 1 gm/ml. So 18 ml of water contains 18 gm of water implies 1 mole of water.

By Avogadro no. 1 mole of water contains 6.023 x 10^(23) molecules of water.

But each molecule of water contains 10 electrons.

Thus 6.023 x 10^(23) molecules of water will contain 10 x 6.023 x 10^(23) electrons= 6.023 x 10^(24) electrons.