I. Write the dissociation equation for the following ionic compounds. Be sure to balance the equation and include the state of matter symbol. Potassium carbonate
Magnesium nitrate
Sodium sulfate
Lead II chlorate
Lead II nitrate
Potassium Iodide
Strontium chloride
Sodium carbonate
Iron III chloride
II. For each of the following soluble solutes, write a dissociation equation. Put a star by the one that is a nonelectrolyte.

HCl(g)

MgCl2(s)­

C6H12O6(s)

FeCl3(s)

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.

The density of e85 fuel is 0.801 g/ml. what is the mass of 1.00 gallon of the fuel? (1 gal. = 3.785 l)

How many kmin (kilominutes) are there in 18 weeks and 5 days?