Answer:
2HCl(aq) + Mg(s) -> MgCl2(aq) + H2(g)
Step-by-step explanation:
The balanced chemical equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2) is:
2HCl(aq) + Mg(s) -> MgCl2(aq) + H2(g)
In this equation, "HCl(aq)" represents hydrochloric acid in aqueous solution, "Mg(s)" represents solid magnesium, "MgCl2(aq)" represents magnesium chloride in aqueous solution, and "H2(g)" represents hydrogen gas. This equation is balanced because it has an equal number of atoms of each element on both sides of the reaction arrow.