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

Isotope Abundance

(%) Mass

(amu)

28Si 73.71 27.98

29Si

14.93 28.98

30Si 11.36 29.97

What is the atomic mass of silicon for this planet?

Verified Answer :

meerkat18


To calculate the average mass of the element, we take the summation of the product of the isotope mass and the percent abundance.In this case, it becomes 280.7371 + 290.1493 + 30 *0.1136. This is equal to 28.376 g/mol.

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