Calculate the average atomic mass of Mg if the naturally occurring isotopes are Mg - 24, Mg - 25 and Mg - 26. Their masses and a
bundances are as follows:
Mg - 24 relative atomic mass = 23.985 amu % abundance = 78.70%
Mg - 25 relative atomic mass = 24.986 amu % abundance = 10.13%
Mg - 26 relative atomic mass = 25.983 amu % abundance = 11.17%
1 answer:
Answer:
24.309
Explanation:
mass×percentage+.. = average amu
23.985×78.7/100+24.986×10.13/100+25.983×11.17/100
to three decimal places
=24.309
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