Question

find the molecular mass of h20​

Answer 1

Answer:

18

Explanation:

atomic mass of H =1

atomic mass of O = 16

so,

2 atoms of H (mass) + 1atom of O (mass) =H2O

=2*1+1*16

=2+16

=18

Answer 2

Answer :

Atomic mass of 1 H atom = 1u

Atomic mass of 1 oxygen atom = 16u

• Water molecules contains 2 atoms of hydrogen & one atom of oxygen .

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$\therefore \sf \: Molecular \: mass \: of \: H_2O \\ \\ \longrightarrow \sf \: 2 \times 1 + 16 \\ \\ \longrightarrow \sf \: 18u$