What, if any, precipitate would form when solutions of NiCl2 (aq) and AgNO3 (aq) are mixed together? Hint:  Consult the solubiltiy rules to determine the correct answer.

A compound is composed entirely of sulfur and oxygen. What is the empirical formula of this compound if it contains 50.0 % sulfur by mass, and the rest is oxygen?

Which of the following compounds contains ONLY  ionic bonds? Hint: Ionic bonds are found in ionic compounds and covalent bonds are found in molecular compound and within polyatomic ions. 

What is the correct chemical formula of a compound composed of calcium ions and sulfate ions? 

What is the net ionic equation for the reaction of aqueous solutions of hydrobromic acid and sodium hydroxide?

Which of the following compounds contains ONLY  ionic bonds? Hint: Ionic bonds are found in ionic compounds and covalent bonds are found in molecular compound and within polyatomic ions.   

How many moles of oxygen are in 3.0 moles of aluminum perchlorate, Al(ClO4)3?

What is the correct chemical formula of a compound composed of potassium ions and phosphate ions?

What is the net ionic equation for the reaction of aqueous solutions of sulfuric acid and sodium hydroxide?

How many moles of oxygen are in 2.0 moles of barium perchlorate, Ba(ClO4)2?