What are some facts of rectants and example fast i need it

Answer: H2 (hydrogen gas) and O2 (oxygen gas) are reactants in the reaction that forms liquid water: 2 H2 (g) + O2 (g) → 2 H2O (l).

Explanation:

Notice mass is conserved in this equation. There are four atoms of hydrogen in both the reactant and product side of the equation and two atoms of oxygen.