Question

Calculate the relative molecular mass of water (H2O)

Answer 1

the relative molecular mass of water
H=2*1=2
O=16
so the actual mass is 16+2=18

Answer 2

$\underline\mathfrak\orange{Answer:-}$

$\fbox\red{18~u}$

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$\underline\mathfrak\orange{Explanation:-}$

.

Atomic mass of hydrogen = 1 u.

oxygen = 16 u

.

So, the molecular mass of water, which contains two atoms of hydrogen and one atom of oxygen is

= 2 × 1 + 1 × 16

= 18 u