omg can someone please answer this already. In the chemical reaction 3H2 + N2 --> 2NH3, how many moles of NH3 will be produced if 4 moles of nitrogen react?

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Iknow the answer is a but i don't know why

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)