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A researcher is trying to find the average atomic mass of a sample of an unknown element. The relative abundances and masses of the three isotopes of the element are found in the table below. What is the average atomic mass of the element? Round your answer to the nearest 0.01 and include units.

Isotope Mass Abundance
A-68 68.43 amu 23.65%
A-70 70.32 amu 26.01%
A-71 71.40 amu 50.34%



Answer :

pstnonsonjoku

The relative atomic mass of the unknown element A is 70.21 amu.

What is the relative atomic mass?

The relative atomic mass could be calculated from the individual relative atomic masses of the elements that are given in the problem as well as percentages.

Now we can go ahead with the calculation. Let the element be known as A.

We now have;

[68.43(0.2365) +  70.32(0.2601) +  71.40(0.5034)]

= 16.18 + 18.29 + 35.74

=  70.21 amu

Hence, the relative atomic mass of the unknown element A is 70.21 amu.

Learn more about relative atomic mass:https://brainly.com/question/25698972

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