which of these formulas could be only an empirical formula, only a molecular formula, either a molecular or an empirical formula?

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

Which description best characterizes the motion of particles in a solid?

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.