Asked by Jun
Gallium has an atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exxists as a Ga-69 (68.9257 amu). What isa the identity and the atomic mass of the other isotope?
Answers
Answered by
drwls
Assume there are only two isotopes present. The average atomic mass is 69.7. If 60.4% is isotope Ga69, then 39.6% has a different mass, M. Solve this weighted-average-mass equation for M:
69.7 = (.604)(68.93) + (.396)M
.396M = 69.7 - 41.63 = 28.07
M = 70.87
That other isotope would probably be isotope Ga71.
A table of isotope abundances confirms this result
69.7 = (.604)(68.93) + (.396)M
.396M = 69.7 - 41.63 = 28.07
M = 70.87
That other isotope would probably be isotope Ga71.
A table of isotope abundances confirms this result
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.