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o Spig : C -M Revised Letter Bag Schedule- X x Y M inbox (646)-yun0122@conn· xy-e Durham Technical Communit aplinglearning.com/ibiscms/mod/ibis/view.php?id=4762888&proceed-1; earnin Question 2 of 6 General Chemistry 4th Due Da Points Pa Grade Ca Uni ty Science Books presented by Sapling Leaming compounds include computer memory chips, light emitting diódes and lasers. Ra gallium are used to image the human body and locate tumors. sotopes of occurring gallium consists of two is s. One of those isotopes is 7'Ga with an isotopic mass of Policles: 70 9247050 amu and an abundance of 39892%. What is the mass number ofthe other isotope? Number O eTextbook O Help With Th

Explanation / Answer

Solution Formula for the relative atomic mass = (relative abundance x isotopic mass)

39.892 % is 71Ga with an isotopic mass of 70.9247050 amu

So remaining % ( 100 - 39.892 = 60.108 %) is the other isotope.

Relative atomic mass of Ga is 69.723 amu

69.723 = (70.9247050 * 0.39892) + (x * 0.60108)
69.723 = 28.29329332 + 0.60108x
41.42971668 = 0.60108x
x = 68.92546197 amu is the mass number of the other isotope.

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