Security Stud. 1  Full mortise hinges are available with security studs for added safety. 2  With the door in its closed position, a stud attached to one leaf of the hinge projects into a hole in the matching leaf.
Net Ionic Equation. A chemical reaction involves the conversion of reactant atoms or molecules to product. During any chemical reaction, reactant molecules are joined together to form a product which has different chemical and physical properties than the reactants.
Balanced formula has 6 positive charges (2 aluminum ions with a +3 charge) and 6 negative charges (3 sulfate ions with -2 charge). Mixtures Vs. Compounds. The law of constant composition states that the ratio by mass of the elements in a chemical compound is always the same, regardless of the source of the compound.