Check sibling questions

A - 3.125 x 10 -2

B - 1.25  x 10 -2

C - 2.5 x 10 -2

D - 2 x 10 -2

 

Answer

A - 3.125 x 10 -2

 

Explanation:

In one molecule of Mg 3 (PO 4 ) 2 there are 8 Oxygen atoms

So in 1 mole of Mg 3 (PO 4 ) 2 molecules , there will be 8 moles of Oxygen atoms.

 

1 mole of Mg 3 (PO 4 ) 2 → 8 moles of O atoms

               X                → 0.25 moles of O atoms

 

Cross multiplying, 

0.25 x 1 = 8X

X = 0.25/8

X = 3.125 x 10 -2


3.125 x 10 -2 moles of Magnesium Phosphate will contain 0.25 mole of oxygen atoms.

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CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo