Which one of the following statements is true?

A. Earth has 1 ocean, but it is divided into 5 sections.
B. An ocean is a smaller body of salt water that is partially or fully enclosed by land.
C. The gradual evolution of photosynthesis changed the atmosphere by releasing large amounts of free nitrogen.
D. The two sources of the water in the oceans was volcanic out-gassing and photosynthesis.

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?

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

What type of energy conversion occurs when you place your feet near the fire place and they become warm