Question

Atomic weight of chlorine is 35.5. It has two isotopes of atomic weight 35 and 37. What is the percentage of heavier isotope in sample?

Answer 1

Answer:

Relative atomic mass = (% x mass of first isotope) + (% x mass of second isotope)

Let % of first isotope be x%=x/100 ,%of second isotope =100-x/100

# x/100 * 35 + x-100/100 *37 =35.5

on solving we get x=75

mass of heavier isotope =100-75 =25

therefore % of heavier isotope is 25%

I hope this will help you

Answer 2

Answer:

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