1. Molarity is to moles of solute over liters of solution as molality

Question

is to
A. molar concentration over molal concentration.
B. moles of solute over kilograms of solvent.
C. molal concentration over molar concentration.
D. moles of solute over moles of solvent.

2. In describing an equilibrium reaction involving hydrogen gas, iodine gas, and hydrogen
iodide gas, all of the statements about equation Q = [HI]2 � [H2] [I2] are true except for
which one?
A. Any solids are omitted from equilibrium expressions.
B. The brackets refer to “concentration of . . . ”
C. Coefficients from the original balanced equation (in this case, 2 HI) become exponents.
D. The products go to the denominator, and the reactants go to the numerator.

3. If the angle of collision between molecules A and B in a reaction is favorable, reaction
energy is less than when the angle of collision is unfavorable. If you look up the typical
activation energy for a given reaction in a table, the value you see will be for
A. minimum activation energy.
B. maximum activation energy.
C. average activation energy.
D. the range of values between minimum and maximum activation energy.

4. If a catalyst is used to alter the reaction rate of A + B → AB, we can expect a/an
A. increase in ΔH.
B. increase in the activation energy that initiates the reaction.
C. decrease in ΔH.
D. decrease in the activation energy that initiates the reaction.

Answer 1

What is your thinking on this?

Answer 2

1.D
2.B
3.B
4.A

Answer 3

I've been reviewing these questions for a while. The first one makes no sense. The wording is really strange. They all are worded weird. I just need them explained in a better way. Can you help?