Question

average atomic mass of magnesium is 24.31 AMU this magnesium is composed of 79 mole percent of 24 magnesium and remaining 21% of 25 magnesium and 26 magnesium calculate mole of 26 magnesium​

Answer 1

Answer:

Explanation:

Let the moles of magnesium to be x .

So, the moles of 21% will be (21-x).

Now, to calculate the average atomic mass of magnesium we have to let the total mass to be as 100 and hence the average of all these will be equal to 24.31AMU .

To calculate average atomic mass for finding x:-

{79*24 + 26*x + (21-x)25}/100 = 24.31

1896 + 26x + 525 -25x = 2431

x = 10 .

Hence, the mole of magnesium is 10.

Answer 2

Answer:X=10

Explanation: