A.) the reaction is exothermic and absorbs energy B.) the reaction is exothermic and releases energy
C.) The reaction is endothermic and absorbs energy
D.) The reaction is endothermic and releases energy

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.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.