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16 April, 23:39

Determine the molecular weight of H20.

o 18 g

O 18.0 g

O 18.01 g

O 18.016 g

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Answers (1)
  1. 16 April, 23:44
    0
    The correct answer is D

    18.016 g

    Explanation:

    Molecular Weight : It is the sum of atomic weights of each atoms present in the compound.

    The molecular weught is measured in atomic mass. unit (amu) or simply"u"

    This is calculated by using:

    Molecular weight = number of atom x atomic mass of the atom

    For H2O

    Number of H atoms = 2

    Number of O atom = 1

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

    Molecular weight = 2 (1.00784) + 15.999

    = 18.01558 u

    = 18.016 u
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