Answer:
In water molecule (H2O), number of neutrons =
[(number of neutrons in H) x 2 + (number of neutrons in O)]
= 0 x 2 + 8=8 (as number of neutrons in H = 0)
Mass of 8 neutrons = 8 x 1.00893 = 8.07 (
mass of one
neutron = 1.008934)
Molar mass of water = 1.008x2+16.0 =18.016u
Fraction
of mass due to neutrons
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