If titanium (Ti) has 3 naturally occurring isotopes, titanium-47(43.5%), titanium-48(44.1%), and titanium-50 (12.4%), what is its average r.a.m.?
A. 3.33
B. 47.81
C. 20.445
D. 21.168
Answers
Answered by
2
Explanation:
Is it not the only one that is remotely close to
47 g/mol
? An average must lie in between the numbers averaged, and each titanium isotope has an isotopic mass close to its mass number.
M
I
(
Ti
−
47
)
≈
47 amu
M
I
(
Ti
−
48
)
≈
48 amu
M
I
(
Ti
−
50
)
≈
50 amu
Thus, the average relative atomic mass MUST WITHOUT A DOUBT be between 47 and 50.
47 g/mol
⋅
0.435
+
48 g/mol
⋅
0.441
+
50 g/mol
⋅
0.124
=
47.813 g/mol
−−−−−−−−−−−
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