Which statement describes a chemical property? A particular substance evaporates at 30 °C.
A 2 ft. long metal bar has a mass of only 176 g.
A certain heavy metal turns to a liquid at room temperature.
A metal is added to a beaker of water, and the beaker explodes.

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