Calculate the [H+] for a solution with a pOH of 4.75

In which situation can a mixture always be called a solution

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?