22. ph is a measure of a. hydrogen ion concentration. c. hydroxide ion concentration. b. hydrogen gas concentration. d. hydrolysis. 23. a neutralization reaction between an acid and a base always produces a. salt and acidic anhydride. c. water and basic anhydride. b. salt and basic anhydride. d. salt and water. 24. if the ph of a solution is the solution is basic. a. 2 b. 5 c. 7 d. 10

What is the force of attraction between the particles in a salt crystal

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.