Question

10. The mass of a molecule of water is
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Answer 1

Answer:

Molecular Mass - Molecular mass is a number equal to the sum of the atomic masses of the atoms in a molecule. We know that in a water molecule, there are two hydrogen and one oxygen atom present. So, the total mass of water molecule, in g/mol we can calculate like this: 2H = 2 x 1.008 = 2.016 g/mol.

Answer 2

Explanation:

molecular molecular formula of water= H2O

atomic mass of hydrogen= 1 amu

atomic mass of 2 hydrogen= 2amu

atomic mass of oxygen= 16 amu

hence molecular mass of water = 2amu + 16 amu = 18 amu

amu refers to atomic mass unit.

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