Question on: JAMB Chemistry - 1997
Oxygen is a mixture of two isotopes O and O with relative abundances of 90% and 10% respectively. The relative atomic mass of oxygen is?
A
16.0
B
16.2
C
17.0
D
18.0
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Correct Option: B
816O, 818O
90% 10%
R.A.M = (90)/(100) x 16 + (10)/(100) x 18 = 14.4 + 1.8 = 16.2
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