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The volume at STP of pure O(2) necessary...

The volume at STP of pure `O_(2)` necessary for the complete combustion of 12 g of magnesium of atomic weight 24 is:

A

`22.4dm^(3)`

B

`11.2dm^(3)`

C

`5.6dm^(3)`

D

`12dm^(3)`

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BRILLIANT PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-LEVEL-I
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