Question

average atomic mass of magnesium is 24.31 amu. this magnesium is composed of 79 mole % of ^24 Mg and remaining 21mole % of ^25 Mg. calculate mole % of ^26Mg.

Answer 1

Something is askew here. If you have 79% of one isotope and 21% of the other, that adds to 100% so there is no room for any other isotope.

Answer 2

10

Answer 3

79(24)+x(26)+(21-x)25 whole divided by 100 = 24.31 you get answer by solving X as 10

Answer 4

Ans. 9

Answer 5

Wrong answer

Answer 6

Turtleneck tujhe badkismati