Essential Chemistry for IGCSE - Chemical Calculations (Section 1 - No. 19)
In the reaction: 2Mg + O₂ -> 2MgO. How many moles of O₂ is needed to react with 2 moles of Mg?
1 mole
2 moles
3 moles
0.5 moles
Explanation
From the balanced equation, 2 moles of Mg react with 1 mole of O₂.
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