Science & Mathematics - 16 December 2007

A gas bottle contains 0.650 mol of gas at a pressure of 730torr. more gas was added to the bottle and the final pressure was 1.15atm. how many moles of gas were added to the bottle?
a. 0.0680mol
b. 0.128mol
c. 0.717mol
d. 0.788mol
e. more information is needed.

2007-12-16 08:48:32 · 2 answers · asked by Neha G 1 in Chemistry

1.) 2
2.) 10
3.) 5
4.) 6
5.) 18

2007-12-16 08:46:15 · 9 answers · asked by ANGERST T 1 in Chemistry

2007-12-16 08:43:54 · 2 answers · asked by Anonymous in Chemistry

I am doing acids and alkalies in Science and I can't find an answer to this question.

2007-12-16 08:42:25 · 4 answers · asked by DeeDee 2 in Chemistry

2x squared + 24x + 72
how would you know that those are the correct factors?

2007-12-16 08:40:11 · 4 answers · asked by 11:11 3 in Mathematics

what would be the reaction between copper Cu and sodium hydroxide in aqueous anoxic solution (No oxygen, no air, no any oxidant) ?

2007-12-16 08:39:38 · 3 answers · asked by Manuelon 4 in Chemistry

and

B) 2^x = 4^x - 1

Thank you

2007-12-16 08:38:35 · 4 answers · asked by Anonymous in Mathematics

http://s226.photobucket.com/albums/dd11/jackphotos123/?action=view¤t=Wedge-1.jpg

2007-12-16 08:38:22 · 6 answers · asked by Anonymous in Engineering

By no means am I educated in medicine, but with all of the research being done in genetics, it led me to a question.

Given the emergence of superbugs on a more widespread basis, what's stopping medicine from attacking these germs on genetic basis? Perhaps inject a virus in the patient that would only alter the bacteria's DNA so that it ceases to reproduce?

Why, or why not could this be plausible?

2007-12-16 08:38:03 · 1 answers · asked by Steve R 3 in Medicine

http://s226.photobucket.com/albums/dd11/jackphotos123/?action=view¤t=Wedge-1.jpg

2007-12-16 08:37:43 · 4 answers · asked by Anonymous in Physics

2007-12-16 08:37:33 · 2 answers · asked by jayne h 1 in Botany

(continues question) a pulse of radio waves. For one particular pulsar, the time between two successive pulses is 0.044 s. Determine the average angular speed (in rad/s) of this pulsar.

2007-12-16 08:37:26 · 1 answers · asked by drewman818 1 in Physics

2007-12-16 08:37:14 · 4 answers · asked by Dalton 1 in Mathematics

in DNA identification. If so..how?
also, if it cant, what are examples of how chromatography is used in biology

links would be helpful
thanks

2007-12-16 08:36:19 · 6 answers · asked by sure222 5 in Biology

I am going to ask a series of questions; thank you for the most helpful answers that you can give.( I KNOW THAT EVERYBODY IS DIFFERENT, ASSUME THE PERSON IN THESE SITUATIONS IS NORMAL-AVERAGE)

1. In mathematics do you think that it is intrest in the class that can help a student, or do you think that it is all based on natural ability?

2. Is consitancy in a math class crucial to the studen learnig mathematics?

3. Do you think that a person who is average in math with an intrest to learn and be very good; can become kind of like a genius or very good at it?

4. In all forms of mathematics both advanced and low are there formulas to evey problem?

5. Is math based more on formula, or figuring things out?

Thank you for the most helpful answers that you can give.,

If possible can you also leave the last math class you took, the grade, and your relation to math, thank you.

2007-12-16 08:35:36 · 2 answers · asked by Q guy 4 in Mathematics

2007-12-16 08:35:34 · 14 answers · asked by blue prince cupid 1 in Astronomy & Space

When does an atom lose an electron?

2007-12-16 08:30:27 · 7 answers · asked by Anonymous in Physics

(tan x + cot x)/sec² x . I keep getting cos² x for the answer, but whenever I plug in an angle, I get two different answers. I multiply both sides by cos²x (inverse of sec²x), and then do a process of elimination with the cosines and sines, and get cos²x. What is the correct answer to this problem?

2007-12-16 08:30:00 · 3 answers · asked by Just Me 2 in Mathematics

have any of you ever wondered how this univers moves.. was developed.. is there another one?
was the big bang the only thing they could come up with?
what my real question is, did they have any other ways of how the univers was created??

2007-12-16 08:28:44 · 5 answers · asked by j b 1 in Astronomy & Space

When an odd function has a negative leading coefficient, what happens to the graph?

a. The graph is a line.
b. The graph is the steeper.
c. The left end of the graph is going in a positive direction and the right end is going in a negative direction.
d. The left end of the graph is going in a negative direction and the right end is going in a positive direction.

2007-12-16 08:27:18 · 3 answers · asked by Anonymous in Mathematics

i know about factories putting chemicals into the ocean and all that i was just wondering if anyone knew the names of the most hazardous chemicals put in there,,, u get what im trying to ask :D

2007-12-16 08:26:13 · 1 answers · asked by Anonymous in Earth Sciences & Geology

one zero is given. List all zeros of the polynomials

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/614a/Picture5.png

2007-12-16 08:24:16 · 1 answers · asked by kim L 1 in Mathematics

2007-12-16 08:23:52 · 1 answers · asked by *Sandra* 1 in Physics

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/614a/Picture3.png

2007-12-16 08:23:30 · 2 answers · asked by kim L 1 in Mathematics

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/614a/Picture2.png

2007-12-16 08:23:09 · 1 answers · asked by kim L 1 in Mathematics

one zero is given. List all zeros of the polynomials.
http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/614a/Picture1.png

2007-12-16 08:22:52 · 1 answers · asked by kim L 1 in Mathematics

I'm curious how a satellite 80 times the weight of the earth that is moving at more than 3 and a half thousand kmph around the earth can split in half all of a sudden and yet nobody else on earth witnessed this event (which is just yesterday considering the age of the earth). Is there any other literature that states that this happened(besides from the Quran-Im an ex muslim by the way,so I don't find Islamic literature reliable at all).

Can anyone show me proof that the moon split in two around 1400 years ago?And I mean solid scientific proof, not "it happened cause the Quran said so" .

I'd like to hear the opinion of muslims and non-muslims alike on this, thanks

2007-12-16 08:21:59 · 21 answers · asked by Anonymous in Astronomy & Space

2007-12-16 08:20:23 · 7 answers · asked by Anonymous in Mathematics

2007-12-16 08:19:07 · 5 answers · asked by Anonymous in Chemistry

look at the factored form of P(x) and determine the solutions for x.

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Algebra%20II/613a/Picture1.png

2007-12-16 08:18:32 · 5 answers · asked by Alex M 1 in Mathematics