Balance the following chemical equation: Mg(S) + HC1(aq)_MgC12(aq)+ H2(g)

The answer for #3 is c 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)

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt