(Solved): A piece of mossy zinc is placed in hydrochloric acid ( \( \mathrm{HCl}) \) and bubbles are given of ...

A piece of mossy zinc is placed in hydrochloric acid ( \( \mathrm{HCl}) \) and bubbles are given off, which cause a lit wooden splint to make a pop sound. Which balanced equation best represents the observations? \[ \mathrm{Zn}+2 \mathrm{HCl} \cdots \mathrm{ZnCl}_{2}+\mathrm{H}_{2} \] \[ \mathrm{Zn}+2 \mathrm{HCl} \ldots \mathrm{ZnH}_{2}+\mathrm{Cl}_{2} \] \[ \mathrm{Zn}+2 \mathrm{HCl} \cdots \mathrm{Zn}(\mathrm{HCl})_{2} \] \[ \mathrm{Zn}+\mathrm{HCl}+2 \mathrm{H}_{2} \mathrm{O} \cdots \mathrm{Zn}(\mathrm{OH})_{2}+1 / 2 \mathrm{O}_{2} \]