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4Mg + 2O2 ---> 4MgO

4 moles of MgO is formed.

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11y ago
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13y ago

I assume you mean this reaction.

2Mg + O2 -> 2MgO

( we can assume Mg limits )

as you can see they are one to one ( Mg and MgO ) so.........

3.5 moles MgO

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8y ago

3 moles of magnesium are needed.

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14y ago

1.75

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Q: How many moles of oxygen gas are needed to react with 3.50 moles of magnesium to produce magnesium oxide?
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