Which statement is true about the potential energy diagram for an extra thermic reaction​

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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.

Compare and contrast refraction of light and sound will give brainliest