You have four bottles labeled 1, 2, 3, 4. Each bottle has a white powder in it. The identities of the substances are held secret
2 answers:
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<u>Answer:</u> The average atomic mass of the element is 6.95 amu
<u>Explanation:</u>
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Mass of isotope 1 = 7.02 amu
Percentage abundance of isotope 1 = 92.6 %
Fractional abundance of isotope 1 = 0.926
Mass of isotope 2 = 6.02 amu
Percentage abundance of isotope 2 = 7.42 %
Fractional abundance of isotope 2 = 0.0742
Putting values in equation 1, we get:
Hence, the average atomic mass of the element is 6.95 amu