Which is not true of binary compounds? a. these contain only two elements. b. the name of the positively charged nonmetal ion is changed to end in –ide. c. the positively charged metal ion is written first. d. these usually consist of a metal and a nonmetal.

i just got this problem. it's 90.3

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: