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A sample of oxygen contains two isotopes...

A sample of oxygen contains two isotopes of oxygen with massess 16 u and 18 u respectively. The proportion of these isotopes in the sample is `3 : 1` . What will be the average atomic mass of oxygen in this sample ?

A

17.5 u

B

17 u

C

16 u

D

16.5 u

Text Solution

Verified by Experts

The correct Answer is:
D
Isotope 1 `to ` 16 u
Isotope `2 to 18u`
Proportion of Isotopes =3:1
Now Average atomic Oxygen `=(16xx3) +(18xx1)//3+1=16.5u`
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Knowledge Check

  • O - 18 isotope of oxygen will have

    A
    18 protons
    B
    9 protons and 9 neutrons
    C
    8 neutrons and 10 protons
    D
    10 neutrons and 8 protons

  • 16 g oxygen contains __________atoms of oxygen.

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    D
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  • The number of electrons is 1 an isotope of oxygen is

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    B
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    C
    12
    D
    10

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