The density of gold at the room temperature is 19.3 g/cm3, and the density of gold at its melting point is 17.31 g/cm3. What does this information indicate about the differences between solid gold and liquid gold?

A. When solid gold melts, its particles move farther apart

B. The particles in solid gold have more energy than those in liquid gold

C. When solid gold melts some of its particles evaporates

D. The particles in solid gold have more mass than those in liquid gold

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