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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

`3.125xx10^(-2)`

C

`1.25xx10^(-2)`

D

`2.5xx10^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
B
As 8 moles of O-atoms are contained by 1 mole `Mf_(3)(PO_(4))_(2)`
`thereofre 0.25` mole of O-atoms are present in `Mg_(3)(PO_(4))_(2)`
`=1/8xx0.25=3.125xx10^(-2)mol`
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