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Help me answer this chemistry question. thank you!
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24 votes
Help me answer this chemistry question. thank you!

Help me answer this chemistry question. thank you!-example-1
User Marventus
by
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1 Answer

26 votes
26 votes

Answer:

78.85

Step-by-step explanation:

To calculate the average atomic mass of the isotopes we use the given masses and abundances, as follows:

  • Mass of Isotope 1 * Abundance of Isotope 1 + Mass of Isotope 2 * Abundance of Isotope 2 + ....

In other words:

  • 78 amu * 75/100 + 81 amu * 15/100 + 82 amu * 10/100 = 78.85

So the answer is 78.85.

User Ttsesm
by
2.7k points
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