Science & Mathematics - 4 October 2007

Which of the following is the major organic product obtained from the reaction shown in the link?
http://i20.tinypic.com/fyq3kg.jpg...

I think it is b) but what is the two on top of the structure for? Someone else says it is d) but what happens to the CH3 then?

2007-10-04 12:04:31 · 2 answers · asked by Anonymous in Chemistry

What's the cheapest telescope with a camera mount? I want to put a Fujifilm camera on a telescope. Fujifilm cameras work with Nikon lenses. It's an SLR obviously. I don't have any specific needs. I want want something fun to play with so I want to spend as little as possible.

2007-10-04 12:03:39 · 7 answers · asked by Anonymous in Astronomy & Space

For a complete combustion, it takes 5 moles of pure O2 oxygen gas to react with every 2 moles of ethyne (C2H2). However, if air contains only 21% oxygen by volume, then what is the ratio of air to ethyne needed for a complete combustion? Would it be 2 moles of ethyne for 25 moles of air (since around 1/5 of air is oxygen, and 5 moles of oxygen is needed)?

2007-10-04 12:00:43 · 1 answers · asked by Anonymous in Chemistry

2007-10-04 11:57:59 · 3 answers · asked by Anonymous in Chemistry

the compounds are:
A) Ca(OH)2 B) ZnS C) Pbl2 D) Ca3(PO4)2 E) MgCO3

one more question:
Which of the following compounds would be more soluble in 1 M NH3 than in pure water? and why?

A) BaSO4 B) AgBr C) Pbl2 D) BaF2 E) Ca(OH)2

2007-10-04 11:54:13 · 1 answers · asked by MO BE 1 in Chemistry

2000-1990+1980-1970+... +20-10

(the three dots are what i am not understanding, i didn't know how to put them onto a computer, they are actually more centered not on the bottom of the line)

My book tells me the answer is 1000

I'm just not getting what these dots between the two + signs mean or are telling me to do.. any help??

2007-10-04 11:54:06 · 9 answers · asked by Kitterkat 5 in Mathematics

I need to write a few sentences on the process of blood clotting (relatively short) and I don't know where to begin. Can someone please just give me a few sentences (including thrombin and prothrombin) describing how it is?

2007-10-04 11:50:29 · 4 answers · asked by twoxsmart327 2 in Medicine

what is 26668.83777

to the one tenth of a millisecond???

2007-10-04 11:48:35 · 2 answers · asked by rickyricardoiscool 1 in Physics

I want to take heat Solar, Candle, water, heat and light a lightbuld with it what would i need to make this happen?

2007-10-04 11:46:51 · 3 answers · asked by Anonymous in Physics

2007-10-04 11:46:07 · 13 answers · asked by Anonymous in Biology

Four is added to the quantity three minus the sum of negative seven and six. The answer is then multiplied by three. What is the result?
This is for my 13 year old's pre-algebra class. Thanks for any help!!!

2007-10-04 11:44:03 · 12 answers · asked by Dawn Q 1 in Mathematics

please answer ASAP thanks :D

2007-10-04 11:42:46 · 5 answers · asked by ukie chick 2 in Biology

If you divide a particular three-digit number by 2, 3, 4, 5, or 6 there would be a remainder of 1. If you divide3 the same three-digit number by 11, there would be no remainder. What is the smallest possible positive three-digit integer that will meet there conditions.

2007-10-04 11:42:25 · 3 answers · asked by grazy76 1 in Mathematics

In the reaction of cobalt(II) chloride and hydrogen fluoride, cobalt(II) fluoride and hydrochloric acid are formed. If 18.6 moles of cobalt(II) fluoride are to be formed what is the mass of CoCl2 needed (grams)? Give an answer accurate to the tenths.

2007-10-04 11:37:02 · 1 answers · asked by Anonymous in Chemistry

Please answer if youcan..... ten points to first right answer

2007-10-04 11:36:18 · 5 answers · asked by MsHunny 3 in Astronomy & Space

What would happen if a human was never exposed to light of any kind from birth until the age of 13?

2007-10-04 11:35:48 · 19 answers · asked by ~JennyBunny~ 7 in Biology

2007-10-04 11:35:29 · 4 answers · asked by THEM 2 in Physics

2007-10-04 11:33:28 · 1 answers · asked by Anonymous in Mathematics

1) Skeletal muscle cells are multi-nucleated, that is, each cell contains more than one nucleus. Explain how this could come about, given what you know about nuclear division and cytoplasmic division.

2) What phase of the cell cycle are most of your skin cells in right now? (prophase, metaphase, anaphase, telophase)

I already tried googling.

Thank you.

2007-10-04 11:32:35 · 3 answers · asked by Caroline 7 in Biology

Please help if you can.... ten points to first right answer

2007-10-04 11:31:34 · 6 answers · asked by MsHunny 3 in Astronomy & Space

I am hypo-thyroid (under active thyroid) and have been since age 12. (Hashimotos disease)
I just got my lab results today and my
TSH is 5.05
and Thyroid is 1.18

I am taking synthroid 137mg everyday.
*am I still not getting enough medication?
and if not - how far off am I??
(and is this why I'm having trouble losing weight????)

I see my doctor tomorrow .. thanks!

2007-10-04 11:30:19 · 3 answers · asked by Mommy of One 4 in Medicine

Please help if you can... 10 points to the first right answers

2007-10-04 11:28:15 · 11 answers · asked by MsHunny 3 in Chemistry

2007-10-04 11:23:49 · 2 answers · asked by gwendiequilts 1 in Weather

THe Top of Mt. Everest is 29,028ft above sea level

2007-10-04 11:22:18 · 6 answers · asked by eugennwhite 1 in Physics

-2x+5y-2z=-5

2007-10-04 11:20:38 · 2 answers · asked by garrett m 1 in Physics

2 - 7i / 1 + 6i + 3 - 5i / 1 + 6i

2007-10-04 11:18:32 · 4 answers · asked by william5000forever 2 in Mathematics

-2x +z = 1, and -1y + z =1

2007-10-04 11:17:40 · 2 answers · asked by garrett m 1 in Mathematics

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.

1) What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior

2) What is the partial pressure of oxygen in air at atmospheric pressure (1 atm)? Assume ideal behavior.
Express your answer numerically, in atmospheres.

2007-10-04 11:17:21 · 2 answers · asked by Anonymous in Chemistry

If 1.00 mol of argon is placed in a 0.500-L container at 23.0 degrees C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)?

For argon, a = 1.345 (L^2 X atm)/mol^2 and b = 0.03219 L/mol

2007-10-04 11:14:32 · 1 answers · asked by Anonymous in Chemistry

O
/ /
R--C
\
O--H




A. Carbonyl
B. Dehydroxyl
C. acetyl
D. Methyl
E. Carboxyl

2007-10-04 11:13:43 · 1 answers · asked by jessica 1 in Chemistry