Calculate the number of atoms of each element. 2,6,15,3,8,5?

In an oxidation-reduction reaction, oxidation is what happens when a reactant

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

How do you know when a chemical reaction has occurred