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The average atomic mass of a mixture con...

The average atomic mass of a mixture containing 79 mol % of `""^(24)Mg` and remaining 21 mole % of `""^(25)Mg` and `""^(26)Mg`, is 24.31,% mole of `(26)Mg` is

A

5

B

20

C

10

D

15

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The correct Answer is:
C
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Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole % of .^(24)Mg and reamainig 21 mol % of .^(25)Mg and .^(26)Mg . Calculate mole % of .^(26)Mg .

Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole % of 24mg and remaining 21 mole % of 25mg and 25mg . Calculate mole % of 26mg .

Number of atoms in 12 g of ""_(12)^(24)Mg is equal to

Average Atomic Mass OF Mixture and Average Molar Mass || Percentage Composition OF Compounds

Assertion: The average mass of one Mg atom is 24.305 amu , which is not actual mass of one Mg atom. Reason: Three isotopes, 24 Mg, 25 Mg and 26 Mg , of Mg are found in nature.

Calculate the mass of Mg (atomic mass = 24 g'mol) that combines with 1.5 mol of O_2 to form magnesium oxide (MgO)

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