Question

calculate the number of molecules present in 36 gm of water .( atomic mass of hydrogen = 1u and atomic mass of oxygen = 16u) ​

Answer 1

Explanation:

1. Given mass of water = 36 gm
2. atomic mass of hydrogen = 1u
3. atomic mass of oxygen = 16 u
4. Molecular mass of water = 2 x 1u + 16
5. = 18 u
6. number of molecules = given mass÷ molecular mass
7. number of molecules = 36 ÷ 18
8. number of molecules = 2 answer