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How many moles of magnesium phosphate, M...

How many moles of magnesium phosphate, `Mg_(3)(PO_(4)_(2)` will contain 0.25 mole of oxygen atoms?

A

0.02

B

`3.125 xx 10^(-2)`

C

`1.25 xx 10^(-2)`

D

`2.5 xx 10^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
B
From molecular formula of magnesium phosphate it is evident that each mole of `Mg_(3)(PO_(4))_(2)` contains 8 mole of oxygen atoms.
Therefore, 0.25 mole of oxygen atom will remain present in `(0.25)/(8)` mole i.e., ` 3.125 xx 10^(-2)` mole of `Mg_(3)(PO_(4))_(2)`
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