What is the mass number of the other isotope?

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xq_qneol

Science

Description

Naturally occurring Gallium consists of 2 isotopes. One of those isotopes is 71Gallium with an isotopic mass of 70.9247050 amu and an abundance of 39.892?%. What is the mass number of the other isotope?

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Explanation & Answer

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69.723 = ( 70.9247050  * 39.892/100)  + (x * 0.60108)

69.723=( 70.9247050 * 0.39892 ) + 0.60108x

69.723 = 28.29328332 + 0.60108x

69.723 - 28.29328332 = 0.60108x

41.42970668 = 0.60108x



divide both sides by o.60108

The answer is X=  68.9254 amu

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