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Naturally ocuuring chlorine is 75. 53% C...

Naturally ocuuring chlorine is `75. 53% Cl ^(35)` which has an atomic mass of `34.969 amu` and `24. 47% Cl^(37)`, `24.47%Cl^(37)`, which has a mass of `36. 966` amu. Calculate the average atomic mass of chlorine .

A

35.5 amu

B

36.5 amu

C

71 amu

D

72 amu

Text Solution

Verified by Experts

The correct Answer is:
a
Average atomic mass
`=(% " of I isotope" times " its atomic mass"+ "% of II isotope" times " its atomic mass")/100`
`=(75.53 times 34.969+24.47 times 36.96)/100`
= 35.5 amu
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