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
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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.
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Answer:X=10
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