To make a long story short, my youngest daughter decided to endure
through 4 semesters of chemistry, and now is paying up for it. She is
a talented little girl, but science is not her thing and it hurts for
me to see her study so hard but understand so little. It runs in the
family. I wanted to help myself, but me and my wife are no scientists
at all, plus it was so long ago. Tutoring is very very weak at where
she goes, and we know few friends around here who are capable of
helping, most of which already are looking at us the wrong way for
asking so much. I decided to open my pocket and let you, Chemistry
folks, help us out. I secretly took the next set of questions from my
daughters assignment section, and here they are. I understand that
many (or most) of you would have the problem to giving direct help
like this, "learning and understanding the material is the most
important", right ? Wrong. Only but a few of you would understand the
pain I feel when I see my daughter quietly cry in her room over her
low assignment grades after hours and hours of studying daily.
 
Below I copied down some of the questions and choice answers that came
along. I tried my best to copy down everything number to number, word
for word. Its a little bit difficult to transfer everything to text,
but I tried. Please feel free to clarify if you did not understand a
part.
 
I am asking for a list of answers to the problems, in numerical +
content format, as such :
 
Question 1: Answer 3. The number of moles is 4.0. 
Question 2: Answer 5. The reaction is reversed. 
 
Time is an issue, but I would like the answers to be correct. I do not
want to check my daughters answers and tell her that one of her
correct answers is incorrect simply because what was given to me is a
wrong answer. Once again I apologize for such rude question, but I am
desperate, and I ran out of all other options. I am also considering a
big tip for those who'll work hard on these, do all (or most) of the
questions, provide the correct answers and hopefully as soon as
possible.
 
Thank you once more. You are my last hope. 

I'm breaking a list questions into separated entries as bobbie7-ga
suggested

(Thank you bobbie7-ga). Please provide the answer to the following
problems:

1) The following reaction is at equilibrium:

	N2O4(g) <---> 2NO2(g)

Increasing the pressure will have what effect on the equlibrium ?

1. the equilibrium is shifted to the left

2. the equilibrium is unchanged

3. the equilibrium is shifted to the right


2) Consider the following system at equilibrium.

	H2(g) + I2(g) <---> 2HI(g) + heat

Which response includes all the following that will shift the
equilibrium to the left, and no others ?

	I. increasing the temperature
	II. decreasing the temperature
	III. increasing the pressure
	IV. decreasing the pressure
	V. removing osme HI
	VI. adding some HI
	VII. removing some I2
	VIII. adding some I2

1. II
2. I, VI and VII
3. II, V, and VIII
4. I, III, V, and VII

Howdy jwheel,

Here are the answers to these two questions, followed
by references and search strategy.

Question 1: Answer 1. the equilibrium is shifted to the left
Question 2: Answer 1. II. decreasing the temperature

Question 1: The Principle of Le Chatelier from the PSIgate,
the physical sciences information gateway of the UK Resource
Discovery Network (RDN) website.
http://www.psigate.ac.uk/newsite/reference/plambeck/chem1/p01101.htm

"Equilibrium N2O4 <--> 2NO2. The number of moles of gas
changes in this reaction, from 1 to 2 as written. The
equilibrium system can by reaction change the number
of moles of gas present, so changing the total pressure
will have a significant effect. Increasing the total
pressure will cause the reaction to proceed to the left
(in reverse), decreasing the total moles of gas, while
decreasing the total pressure will cause the reaction
to proceed to the right, increasing the total moles of
gas."

Question 2: From an Australian "AUS-e-TUTE" page about
the Principle of Le Chatelier.
http://www.ausetute.com.au/lechatsp.html

"Consider the following reaction at equilibrium:
H2 ... + I2 ... [ <--> ] 2HI ... + ... [heat]
... 
Reducing the temperature of the equilibrium system will
shift the equilibrium to the left in order to produce
more heat."

So, we know that at least case II is true, which then
eliminates 2 and 4 from being the answer.

This document from School District 67 (Okanagan Skaha)
on the Principle of Le Chatelier eliminates number 3
from being the answer.
http://sd67.bc.ca/teachers/dcolgur/Chem12/Tutorial4.doc

"If the concentration of a substance in an equilibrium
system is decreased by us, the equilibrium will shift
toward the side of the equation with that substance, in 
order to counteract the change."

This is case V, which would shift equilibrium to the
right.

"If the concentration of a substance in an equilibrium
system is increased by us, the equilibrium will shift
toward the other side of the equation, in order to
counteract the change."

This is case VIII, which would also shift equilibrium
to the right.

If you need any clarification, feel free to ask.


Search strategy:

Google search on: equilibrium pressure N2O4
://www.google.com/search?q=equilibrium+pressure+N2O4

Google search on: equilibrium temperature 2HI
://www.google.com/search?q=equilibrium+temperature+2HI

Looking Forward, denco-ga

Thank you very much, every one of you are of such help here. Just
waiting for help with the last (largest) set of questions. Thank you
again.

Thanks for the five stars and the generous tip, jwheel!

Glad to have been of some help.

Looking Forward, denco-ga