Question

From a practice quiz:
Element Gallium has two isotopes with masses 70.9249 amu and 68.9257 amu. Determine the %
abundance of each isotope.
Molar mass of gallium = 69.72

Answer 1

i guess i could help you ...

Answer 2

Pretty sure that the equation is 70.9249(x) + 68.9257(y) = 69.72

I need to solve for x and y which are percentages, x +y = 100%

Answer 3

yes you are right ... but take the percentages to be x and (100-x) that is how you will get it

Answer 4

wait im calculating it

Answer 5

ahhhh, ty,

Answer 6

hehe wait ...

Answer 7

34.49% of and 65.51%?

Answer 8

yes ...

Answer 9

the 34.49% represents the first of the two isotopes in the equation?

Answer 10

http://www.wolframalpha.com/input/?i=+solve+for+x+%2C+70.9249%28x%2F100%29+%2B+68.9257%28%28100-x%29%2F100%29+%3D+69.72

Answer 11

here see for your self

Answer 12

BTW TYVM!

Answer 13

k

Answer 14

wait there is more
http://answers.yahoo.com/question/index?qid=20080819030624AAdLFyf

Answer 15

awesome, i will have 1 or 2 of those type of questions on the mid term this afternoon, it just escaped me how to calculate it.