Science & Mathematics - 19 November 2007

I have no idea....

For the following reaction at a certain temperature, it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.330 mol of F2 is added to this equilibrium mixture, calculate the concentrations of all gases once equilibrium is reestablished.

H2(g) + F2(g) 2 HF(g)

[H2]=
[F2]=
[HF]=

2007-11-19 06:40:17 · 1 answers · asked by Lauren K 2 in Chemistry

I think there could be a whole lot of answers, but it's supposed to be an essay for school. Some competition thing. Anyway, any suggestions?

2007-11-19 06:39:01 · 1 answers · asked by Alice L 2 in Other - Science

why is it people go out and chop the rainforests down and dont grow new trees or kill endangered animals for clothing or a carpet because hey what do we care if it gets burnt in a fire we can always get another one! but what about the poor animal who is killed then it's body desecrated? why? what is the point?

2007-11-19 06:38:43 · 16 answers · asked by Takhisis4tw 2 in Earth Sciences & Geology

some girl asked almost the same problem we must have the same class but
for this function y=logbase3[x+6]-4
the domain would be x>-6
and would be (-inf,inf)
I know you plug 0 into x for the y int can some show me how you get the answer and also the equation of the functions asymptote I know this is alot but if someone could please help it would make my day

p.s what would the graph look like

2007-11-19 06:29:15 · 2 answers · asked by Anonymous in Mathematics

Two problems:

1. I have NO idea how to do this and its not in my book

Explain how to use the graph of f(x)= (3/4)^x to produce the graph of 3/4(x) +2

2. This one I got down to where I have to factor and I cant factor 5x^2 + 75x -10 .... I think I went wrong somewhere???

Solve: log 5x + log (x + 15) = 1

2007-11-19 06:27:46 · 3 answers · asked by betseyjayne82 1 in Mathematics

1. u x v
2. u dot(u x v)
3.the projection of u x v along w
4. the angle between u x v and u

2007-11-19 06:24:49 · 4 answers · asked by sakinah_123 1 in Mathematics

The length of a rectangle is 1 in. more than twice its width. If the perimeter of the rectangle is 50 in., find the width of the rectangle. Solve using an algebraic equation

2007-11-19 06:23:13 · 10 answers · asked by jaeelarr 1 in Mathematics

I need its name and how does it do it.
THANK YOU!

2007-11-19 06:22:00 · 7 answers · asked by Anonymous in Other - Science

I have, yes Science homework, I mean to say, my science teacher TOLD us the 7 forces but we all forgot them... As quick as possible please!
Thank you xxx

2007-11-19 06:18:32 · 9 answers · asked by Sez 3 in Physics

f(x)= √x
f'(x)=1/2√x

now how would I find f"(x) and f'''(x)?

2007-11-19 06:16:20 · 2 answers · asked by Matty B 3 in Mathematics

does any one know why this is ...??

2007-11-19 06:12:21 · 5 answers · asked by up_riser 1 in Astronomy & Space

calculator aint working on comp need answer in fractions thanks

2007-11-19 06:07:58 · 8 answers · asked by lztexan 3 in Mathematics

The logic thing is that the earth created with volcanoes and some things in many millions of years.
Bible says god created world in 7 days!

WHAT'S THE REAL THING!!!!!?

2007-11-19 06:06:17 · 27 answers · asked by Anonymous in Earth Sciences & Geology

I have a question about time travel, and I'm going to use a South Park episode as an example. In the trapper keeper episode, someone comes back from the future to destroy Cartman's trapper keeper because it eventually becomes the ruler of the world. What I don't understand is if he destroyed it, the trapper keeper would have never taken over the world, so he would have never existed, which means he would have never come back to destroy it, so then it would take over the earth. It's just a big cycle.. Am I looking at it wrong or what? I don't think time travel really is possible or anything, its just confusing.

2007-11-19 06:04:40 · 11 answers · asked by Stacy L 1 in Astronomy & Space

the prescriber must provide a written , signed prescription within:-
a. 24 hr
b. 36hr
c. 48hr
d. 72hr

2007-11-19 06:04:32 · 3 answers · asked by Anonymous in Medicine

:

2007-11-19 06:03:48 · 11 answers · asked by kakshko 1 in Mathematics

2007-11-19 06:00:39 · 3 answers · asked by Zanetta Y 1 in Engineering

CH3CH2Br + OH(-) ==>

CH3CH2Br + (CH3)CO(-)==>

Which [E2] reaction in each pair is faster?

This deals with stronger nucleophile, stronger base, the stronger the nucleophile, which favors the E2 eraction. But which base is stronger? I say it's the OH, but some have said it's the other one (CH3)CO-. So which base is stronger, and WHY? Please include his as part of your answer. Thank you.

2007-11-19 06:00:00 · 1 answers · asked by Anonymous in Chemistry

I take 50 mgs of Tramadol occassionally for back pain. I try not to take if I don't need it. A friend of mine called this afternoon and invited me to go out for drinks tonight. I know I am not supposed to drink with Tramadol. How long do I have to wait after my last dose to safely have a couple of drinks again?

2007-11-19 05:59:51 · 1 answers · asked by Leo S 1 in Medicine

Someone murdered my ex and I am wondering if they can pull up satellite images of the place they found her body and maybe find the vehicle that must have been there?

2007-11-19 05:59:14 · 4 answers · asked by Anonymous in Astronomy & Space

Let a sequence be defined by x(n+1) = ( x(n)^5 +2)/6 with x(1)=0.

Show x(n+1)-x(n) =< 5/6 [x(n)-x(n-1)] =< 1/3 (5/6)^(n-1)

Presumably we can solve this using induction, though it seems quite tricky and I've made a mess of it so far. Or is there a better method? Thanks very much.

2007-11-19 05:53:00 · 2 answers · asked by Anonymous in Mathematics

i forgot my calculator at home and this is the final step....

2007-11-19 05:46:47 · 2 answers · asked by adrianascatering 2 in Engineering

A molecule with the formula AB_3 has a trigonal pyramidal geometry.

2007-11-19 05:45:45 · 1 answers · asked by Anonymous in Chemistry

2007-11-19 05:45:12 · 6 answers · asked by Misstress in distress 2 in Engineering

The first law of motion can be referred to as "The law of inertia" so what would you call the second?

2007-11-19 05:43:02 · 5 answers · asked by Anonymous in Physics

Their natural navigation would be not scrambled by the opposite manetic property of Earth?

2007-11-19 05:34:12 · 2 answers · asked by Anonymous in Earth Sciences & Geology

I don't want to believe this crap, but I need information opposing the belief of this planet?
The only thing I have is common sense:
IF the planet does have an orbit similar to a comet's, then wouldn't the people on the planet die because it's so cold?
IF the planet did interact with our solar system some years ago, why did it collide with earth and not mars or jupiter? Especially Juptier, because of it's huge mass wouldn't it pull the planet towards it, or even stabilize it?
What the hell do the sumarians know anyway?

2007-11-19 05:32:21 · 13 answers · asked by Jansen J 4 in Astronomy & Space

The figure shows a bicycle wheel resting against a small step whose height is h = 0.140 m. The weight and radius of the wheel are W = 22.0 N and r = 0.390 m. A horizontal force F is applied to the axle of the wheel. As the magnitude of F increases, there comes a time when the wheel just begins to rise up and loses contact with the ground. What is the magnitude of the force when this happens?

2007-11-19 05:28:45 · 3 answers · asked by mjamen 1 in Physics

What is a normal body temperature?
I smoke, I cough by the last 3 yrs, I feel no pain, the only way to find out that I become sick is about my body temperature.

2007-11-19 05:26:10 · 2 answers · asked by Anonymous in Other - Science

Simplify sqrt (-49) - sqrt (-8)

Simplify 16-3/4

2007-11-19 05:21:20 · 3 answers · asked by B K 1 in Mathematics