How is the following information provided in a chemical equation?

1. an aqueous solution
2. the reaction conditions
   

Chemical equation

A chemical equation is a concise description of a chemical reaction in terms of symbols and formulae of the chemicals involved in the reaction.

Aqueous solution

1. Aqueous solutions are those that have water as their solvent.
2. In chemical equations, it's commonly represented by appending (aq) to the applicable chemical formula.
3. A solution of table salt, or Sodium chloride($\mathrm{NaCl}$) in water, for example, might be represented by

$$\begin{gathered} Nacl\left(aq\right)\to N{a}^{+}\left(aq\right)+C{l}^{-}\left(aq\right) \\ \text{Sodium chloride}\text{Sodium}\text{Chloride} \end{gathered}$$

Reaction conditions

1. The temperature, pressure, and catalyst information, among other things, is supplied above the arrow $\left(\to or=\right)$ separating the reactants and products. The following is a description of a reaction taking place at $t°\mathrm{C}$ and p atm pressure in the presence of a catalyst.
2. $Reac\tan ts\underset{Catalyst}{\overset{{\text{t}}^0\text{c,p atm}}{\to }}Products$
3. For example, with the following conditions: temperature$=450°\mathrm{C}$, pressure$=200-900\mathrm{atm}$, and the presence of a catalyst, nitrogen, and hydrogen react to generate ammonia (a mixture of iron and molybdenum). The following is the chemical equation for this reaction.

$$\begin{gathered} {\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)\frac{450°\mathrm{C},200-900\mathrm{atm}}{\mathrm{Fe}+\mathrm{Mo}}2{\mathrm{NH}}_3\left(g\right) \\ \text{Nitrogen}\text{Hydrogen}\text{Ammonia} \end{gathered}$$