lithium(Li) is 7.016 amu calculate the average atomic mass of lithium

Chemistry
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Sep 23rd, 2015

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SOLUTION:

lithium (Li) has 2 isotopes: 6Li 6.015 amu 7.42% & 7Li 7.016 amu 92.58%

Hence, the average mass of lithium is calculated by:

Avg. mass = 6.015 amu x 7.42% + 7.016 amu x 92.58% = 6.941 amu

Sep 23rd, 2015

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Sep 23rd, 2015
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