From Part b, an atom of 3H is more massive than an atom of 3He.
mass 3He = 3.02439 amu
mass 3H = 3.0252 amu
= 8.02 x 10-4 amu
Precision of mass spectrometer:
The natural abundance of 3 He is 0.000137 %.
Based on your answer for part (b), what would need to be the precision of a mass spectrometer that is able to differentiate between peaks that are due to 3He+ and 3H+ ?
a) 1 × 10− 21 g
b) 1 × 10−21 kg
c) 1 × 10−27 kg
d) 1 × 10−24 g
e) 1 × 10−27 g
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