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Q.

${}^{35}{Cl}$ and ${}^{37}{Cl}$ are two isotopes of chlorine, in the ratio 3:1 respectively. If the isotope ratio is reversed, the average atomic mass of chlorine will be

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a

36.5 u

b

35.5 u

c

36.0 u

d

35.0 u

answer is D.

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Detailed Solution

$Average atomic mass = \frac{25 \times 35 + 37 \times 75}{100} = 36 .5 u$

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