Question

Question #51840

Answer 1

Molar mass of water is `2xx1.008+16.00~~18g`.

Explanation:

So `1.8g=0.1mol`

One mol contains `6.02xx10^23` particles, so there are
`0.1xx6.02xx10^23=6.02xx10^22` water molecules, each containing 3 atoms (`2xxH+1xxO`):

Number of atoms:
`3xx6.02xx10^22=18.06xx10^22=1.8xx10^23`