Question

Molecular mass of water,

Answer 1

Molecular mass of water is 18

Answer 2

Molecular Mass - Molecular mass is the number which shows that one molecule of a substance is how many it's heavier than 1/12 part of C-12 atom.

How to calculate molecular mass?

• We can calculate molecular mass of a substance by adding atomic masses of all atom present in the molecule.

Now let's calculate the molecular mass of Water (H20).

• Note - The Chemical Formula of water is H2O.

The atomic masses of -

• Hydrogen (H) - 1
• Oxygen (O) - 16

Molecular mass of Water (H2O) -

$\longrightarrow \tt {2 \times H + O}$

$\longrightarrow \tt {2 \times 1 + 16}$

$\longrightarrow \tt {2 + 16}$

$\longrightarrow \tt\blue {18u. }$

• The Molecular Mass of Water is 18u.