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30g Mg and 30g O(2) are reacted and the ...

30g Mg and 30g `O_(2)` are reacted and the residual mixture contains:

A

50 g of Magnesium oxide and 10 g of oxygen

B

40 g of Magnesium oxide and 20 g of oxygen

C

45 g of Magnesium oxide and 15 g of oxygen

D

60 g of Magnesium oxide only

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The correct Answer is:
A
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