Question

How many water molecules are in `0.15` moles of `"H"_2"O"`?

Answer 1

`9.0 xx 10^22` molecules.

Explanation:

`1` mole has `6.022 xx 10^23` molecules.

Thus, `0.15` or `3//20` moles has

`(6.022xx3xx10^23)//20 = 9.0xx 10^22` molecules of water