The concentration of hydrogen ions in an aqueous solution is 1.0 × 10-5 M at 298 K. What is the concentration of hydroxide ions in the same solution? A. 1.0 × 10-14 M

B. 1.0 × 10-9 M

C. 1.0 × 10-7 M

D. 1.0 × 10-5 M

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Answer the molar mass of magnesium is 24.305g/mol.