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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
1 mole of `Mg_3 (PO_4)_2`
`implies 3` moles of Mg atom +2 moles of atom + 8 moles of O atom
8 moles of oxygen atoms are present in 1 mole of `Mg_3 (PO_4)_2`
0.25 mole of oxygen atoms are present in
`=( 1 xx 0.25 )/(8 ) = 3.125 xx 10^(-2)` moles of ` Mg_3 (PO_4)_2`
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