• Feb 20, 2026 chemistry matter change assessment answers n: Mg + HCl → MgCl2 + H2 Balanced equation: Mg + 2HCl → MgCl2 + H2 Explanation: Magnesium (Mg) combines with two molecules of HCl to produce one molecule of magnesium chloride (MgCl2) and one molecule of hydrogen gas (H2). Check atoms: Mg (1), Cl (2), H (2) on both s BY Barry Hirthe
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