Describe the significance of a balanced chemical equation over the skeletal equation.

Give word equations for the following chemical reaction and give the name of the product formed.
$\mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2$

Give one example each of a chemical reaction showing the following characteristics.

Evolution of a gas

Write the quadrants in which the following points lie:

$\left(-4,7\right)$

Study the change described below and answer the questions.
Hydrochloric acid + Sodium hydroxide $\to$ Table salt + Water

Name these substances that are reactants.