AP Chemistryeasymcq1 pt
Which balanced equation represents a single replacement reaction?
A.Mg + 2HCl → MgCl₂ + H₂
B.2Mg + O₂ → 2MgO
C.MgCO₃ → MgO + CO₂
D.MgCl₂ + 2AgNO₃ → 2AgCl + Mg(NO₃)₂
Explanation
Core Concept
One element (Mg) displaces another (H) from a compound — the single replacement pattern.
Correct Answer
AMg + 2HCl → MgCl₂ + H₂
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