Which rule concerning oxidation numbers is NOT true? A. Fluorine always has an oxidation number of –1 in molecules that contain two or more types of atoms.
B. Oxygen has an oxidation number of –2 in molecules that contain two or more types of atoms.
C. If all else fails, assume that the atom’s oxidation number is the same as what it would take on in an ionic compound.
D. Reduction is the process by which an atom gains electrons.
E. Oxidation is the process by which an atom gains electrons.

Phosgene (carbonyl chloride), cocl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. phosgene can be produced by reacting carbon monoxide and chlorine gas at high temperatures: co(g) cl2(g)⇌cocl2(g) carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 477 ∘c . at equilibrium, the concentrations were measured and the following results obtained: gas partial pressure (atm) co 0.830 cl2 1.30 cocl2 0.220 what is the equilibrium constant, kp, of this reaction