help please chem is hard?

Question

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 exceptfor
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 ∆ H.
B. increase in the activation energy that initiates the reaction.
C. decrease in ∆ H.
D. decrease in the activation energy that initiates the reaction.
5. Regarding solutions and solids, which statement is true?
A. If the solvent is water, the crystal lattice energy of a solid is absorbed.
B. Hydration energy is related to the attractions between solute particles.
C. If the solvent is water, the crystal lattice energy of a solid is released.
D. Hydration energy is related to the attractions between solvent particles.
6. Avogadro’s number gives us the number of
A. atoms in any element or compound.
B. particles in a mole of any element or compound.
C. atoms in an element.
D. particles in a sample.
7. A chemical formula containing the simplest whole-number ratio between elements in a
compound is called the _______ formula.
A. derivative C. composition ratio
B. composition D. empirical

Answer 1

2)
3)
4)
5) A
6) B
7) D

Because I'm nice, I did half. You do the harder part.

Answer 2

i found chem hard, too. i yelled, "maxwell's demon!", a lot, and turned in entirely math free tests, asking, "why is the test grade slanted heavily towards math?! you know i know the theory!". my teacher chuckled, gave me a d, which i didn't deserve (i deserved an e, if anyone else had those), and i went on to live a relatively fulfilled life. except i was homeless, for twenty years, and i'm poor as hell, now. still, i can't complain. he let us drink tea (or coffee - he drank tea out of dirty beakers!), in class... and put up with my shenanigans. DO YOUR OWN HOMEWORK! go into the arts or humanities.