Question

atomic mass of water h2o is...
i) 20u
ii) 18u
iii) 13u
iv) 12u​

Answer 1

Answer:

18 u

Explanation:

H = 1 u

H2 = 2u

0 = 16 u

H2 + 0 = 2+16 = 18 u

Answer 2

Answer:

atomic mass of hydrogen is 1u

atomic mass of oxygen is 16u

atomic mass of H2O

1×2+ 16= 18u

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