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.
In all stoichiometry problems the balanced chemical equation provides the bridge that allows us to relate the amount of a reactant to a given amount of another reactant, or to find the amounts required to yield a given amount of a product. Mole Ratios.