A sample of pure NO2 is heated to 337 °C, at which temperature it partially dissociates according to the equation: 2 NO2( g) ∆ 2 NO( g) + O2( g) At equilibrium the density of the gas mixture is 0.520 g>L at 0.750 atm. Calculate Kc for the reaction.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.