Chemistryeasy · Past Paper
In the reaction $2Mg + O_2 \rightarrow 2MgO$, what is the ratio of Mg to O2 atoms/molecules by stoichiometric coefficients?
A1:1
B1:2
C2:1
D2:2
✓ Correct Answer: C — 2:1
The balanced equation shows 2 moles of Mg reacting with 1 mole of O2.
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