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if the average atomic mass of an element having two isotopes is 71,the ratio of the natural abundance of the two isotopes of mass 70 and 74 will be

if the average atomic mass of an element having two isotopes is 71,the ratio of the natural abundance of the two isotopes of mass 70 and 74 will be

Grade:11

1 Answers

Bhavya
askIITians Faculty 1281 Points
11 months ago
Dear student
average mass=( mass1*RA1 +mass2*RA2)/100
where RA=relative abundance in %
let RA of an isotope with mass 70 be x, then RA of an isotope with mass 74= 100-x
thus,
71={70*x +74*(100-x)}/100
solve for x and you will get your answer








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