What is one of the profound observations of the 20th century and what does it imply

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

Draw two cyclic constitutional isomers of cis-1

Draw the lewis dot structure for each of the following polyatomic ions