Answer:
[tex]CaSO_{4}[/tex], [tex]NaNO_{3}[/tex], [tex]MgO[/tex], [tex]K_{2}CO_{3}[/tex], [tex](NH_{4})_{2}S[/tex], [tex]H_{2}SO_{4}[/tex], [tex]Mg(NO_{3})_{2}[/tex], and [tex]SiO_{2}[/tex].
Explanation:
With all of these salts, you have to match the charge of the anion and the cation so that they cancel each other out, making a neutral compound. The charges of each element can be figured out by counting on the periodic table, but you have to memorize or look up the charges of polyatomic ions.