Solve this : 15 Indium (atomic weight = 114 82) has two naturally occurring isotopes, the predominant one - Chemistry - Mole Concept and Stoichiometry

Question

Solve this :

15 Indium (atomic weight = 114 82) has two naturally occurring
isotopes, the predominant one form has isotopic weight 114 9041 and
abundance of 95 72% Which of the following isotopic weights is the
most likely for the other isotope?
(A) 112 94
(B) 115 90
(C) 113 90
(D) 114 90

Raveena Sharma · Accepted Answer

The solution is as follows:

% of isotope 1 = 95 72%
% of isotope 2 = 100-95 72 = 4 28%

Thus,
let the mass of isotope 2 be x:

114 82 = 0 9572×114 9041+x×0
0428      x = 112 94u

Solve this : 15. Indium (atomic weight = 114.82) has two naturally occurring isotopes, the predominant one form has isotopic weight 114.9041 and abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope? (A) 112.94 (B) 115.90 (C) 113.90 (D) 114.90

Solve this :

15. Indium (atomic weight = 114.82) has two naturally occurring isotopes, the predominant one form has isotopic weight 114.9041 and abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope?
(A) 112.94
(B) 115.90
(C) 113.90
(D) 114.90