Naturally occurring Indium has two isotopes. 4.28
%
4.28
%
of the atoms are
Indium
−
113
Indium
-
113
(
113
In
113
In
) with a mass of
112.9

u
112.9

u
and
95.72
%
95.72
%
of the atoms are
Indium
−
115
Indium
-
115
(
115
In
115
In
) with a mass of
114.9

u
114.9

u
. Calculate the average atomic mass of Indium with the correct number of significant figures.

Average Molar mass is 114.8u

Explanation:

» From the formula of average Relative Atomic Mass [ RAM ]

» We have two isotopes of Indium,

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