Question

calculate the molecular mass of water given: atomic weight of hydrogen is 1. oxygen is 16.
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Answer 1

Answer:

Atomic mass of hydrogen = 1u

                         oxygen = 16u

Water is composed of 2 hydrogen and one oxygen (H2O)

So molecular mass of water = (2 X 1) + (1 X 16)

                                               = 2 + 16

                                               = 18u

So molecular mass of water is 18u

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