Homework Help: Chemistry

Posted by Mary Joy on Thursday, September 27, 2012 at 6:36am.

This Chem problem is really difficult -Need help please!
Magnesium Consists of three naturally occuring isotopes. The percent abundance of these isotopes is as follows: 24Mg(78.70%), 25Mg(10.13%) and 26Mg(11.7%). The average atomic mass of the three isotopes is 24.3050amu. If the atomic mass of 25Mg is 24.98584 amu and 26Mg is 25.98259amu, calculate the actual atomic mass of 24Mg.

Chemistry - DrBob222, Thursday, September 27, 2012 at 11:01am
0.7870*y + (0.1013*(24.98584) + (0.117*(25.98259) = 24.3050
Solve for y

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