Express the molecular mass (uncertainty) of C9H9O6N3 with the correct number of significant figures.
7.2 Acid – Base Reactions: A Guide for Beginners All acid–base reactions begin and end with polarized molecules. Some acids (and bases) do not ionize completely; when this occurs we use doubleheaded arrows ⇌ to indicate that the reaction is reversible, and both reactants and products are present in the same reaction mixture. Arrhenius Acids and Bases acid = a compound that dissociates when dissolved in water to produce a proton (H+) and a negativelycharged ion (an anion). naked protons (H+) do not roam around in solution. They always associate with at least one, and more likely multiple, water molecules. = hydronium ion H3O+ An Arrhenius base = a compound that generates hydroxide (–OH) ions when dissolved in water. Brø