Question

Calculate the relative molecular mass of water H2O.​

Answer 1

The formula for water is H2O. Eachmolecule contains 2 hydrogen atoms and 1 oxygen atom.

Relative atomic masses: (H (Hydrogen) = 1, O (Oxygen) = 16).

Thus, The relative molecular mass of water is -

M r ( H 2 O ) = 2 ∗ A r ( H ) + A r ( O ) = 2 x 1 + 16 = 18.

Explanation:

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Answer 2

$\large\pink{\mathbb{ANSWER :-}}$

To calculate the relative molecular mass of water H2O :-

• Atomic mass of Hydrogen = 1u

• Atomic mass of oxygen = 16u

so, the molecular mass of water, which contains 2 two atoms of hydrogen and 1 atom of oxygen :-

= 2×1+1×16

= 2+16

= 18u

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