Respuesta :
Answer: [tex]H_2[/tex] or Hydrogen
Explanation:-
[tex]Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)[/tex]
This is a single replacement reaction in which magnesium replaces hydrogen from its aqueous solution. As magnesium is more reactive than hydrogen , it easily loses electrons to convert to [tex]Mg^{2+}[/tex] in [tex]MgCl_2[/tex] and [tex]H^+[/tex] in [tex]HCl[/tex] accepts electrons to form [tex]H_2[/tex].
Thus magnesium when dropped into an aqueous solution of [tex]HCl[/tex] releases hydrogen gas.
