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Magnesium and Oxygen combine in the rati...

Magnesium and Oxygen combine in the ratio of `3:2` by mass to form magnesium oxide. How much oxygen is required to react completely with 12 g of magnesium.

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Magnesium (Mg( and oxygen (O) combine in the ratio =3:2 to form compound magnesium oxide (Mgo), it follows law of constants properties,
3g of Mg combines with =2g of O
Therefore 12g of Mg combinaes with `2x12//3=8` of oxygen
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