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garik1379 [7]
3 years ago
13

The astronaut then measures the abundance of strontium on the new planet, obtaining the following results:

Chemistry
1 answer:
stich3 [128]3 years ago
8 0
Atomic mass is equal to the average number allowing for the relative abundances of different isotopes. It is calculated by:

Atomic mass = ΣzₓAₓ 

where zₓ is the relative abundance of the isotope and Aₓ is the atomic mass of the isotope.

Atomic mass = (0.0946x85.91) + (0.07x86.91) + (0.8354x87.91) = 87.6508 amu
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