Science & Mathematics - 15 October 2007

coenzyme Q
NAD+
flavoprotein (FP)
cytochrome b

2007-10-15 05:47:21 · 2 answers · asked by Anonymous in Chemistry

2007-10-15 05:46:01 · 9 answers · asked by Sofia 1 in Earth Sciences & Geology

what is its atmosphere composed of

what is the temperature of it

who discovered it and when

what are its characteristics

where is its location

what are the moons

2007-10-15 05:45:21 · 4 answers · asked by lexis 1 in Astronomy & Space

They both are straight chain compounds.
Both of these compound classes have as the smallest compound a 5 carbon skeleton.
Aldehydes and ketones both contain a carbonyl carbon.
Aldehydes and ketones have no shared characteristics.

2007-10-15 05:45:14 · 2 answers · asked by Anonymous in Chemistry

Can someone explain what rust is exactly please? Is it just the metal reacting with oxygen?

If so, how is this different from the oxides formed when a metal is heated and combined with oxygen?

Why can you reverse one and not the other?

2007-10-15 05:43:41 · 5 answers · asked by db 3 in Chemistry

How many grams of will be needed to produce 575mL of a solution that has a concentration of Na^+ions of 1.40 M?


mass of Na3PO4 =________
I have tried & still don't get the correct answer.

2007-10-15 05:42:27 · 5 answers · asked by cvkl 1 in Chemistry

A. solving for the slope.
B. taking the log.
C. estimating the solutions.
D. dividing by the denominator.
E. completing the square.

2007-10-15 05:40:53 · 4 answers · asked by Anonymous in Mathematics

Is radioactive treatment actually safe? What are the side affects - temporary or lasting, and what are the benefits? I know people that have had thyroid surgery and have done fine afterwards. Also, since it takes a while for the thyroid gland to shut down, wouldn't surgery be better if you want to be back to normal sooner? P.S. My doctor is pushing radioactive treatment. But first he wants me to go on an anti-thyroid medication. What is the success rate of anti-thyroid medication. I don't like putting poison into my body.

2007-10-15 05:40:18 · 2 answers · asked by Joyce 2 in Medicine

a primary alcohol
a secondary alcohol
a tertiary alcohol
an acetal

2007-10-15 05:39:44 · 4 answers · asked by Anonymous in Chemistry

What websites are there to revise AS Chemistry (Nuffield/Edexcel) where it just lets me know in brief what exactly I need to know rather than sifting through the thick textbook and not knowing. I have tried 'chemguide' but not found this useful in terms of stating what is in each chapter clearly.

2007-10-15 05:38:12 · 4 answers · asked by Anonymous in Chemistry

A helicopter ascends at a constant speed of 5m/s, how far does it rise in 5 sec?

2007-10-15 05:37:31 · 2 answers · asked by Geno W 1 in Physics

2007-10-15 05:37:27 · 4 answers · asked by jason k 1 in Chemistry

glucagon
insulin
epinephrine
more than one response is correct

2007-10-15 05:36:34 · 4 answers · asked by Anonymous in Chemistry

Given the following data:
PCl5(s) → PCl3(l) + Cl2(g) ΔH = +123.8 kJ
4PCl3(l) → P4(s) + 6Cl2(s) ΔH = +1278.8 kJ

Find the ΔH of the following reaction:
P4(s) + 10Cl2(g) → 4PCl5(s)

2007-10-15 05:36:28 · 2 answers · asked by Anonymous in Chemistry

Enzymes can either speed up or slow down a chemical reaction.
Enzymes are not used up during the chemical reaction in which they are involved.
Enzymes are proteins that are capable of reducing the activation energy.
There are enzymes that interact with one enantiomer, but not the other.

2007-10-15 05:35:49 · 2 answers · asked by Anonymous in Chemistry

solve

2007-10-15 05:34:30 · 8 answers · asked by Kevin G 1 in Mathematics

Given the following data:
TiBr2(s) + SnCl4(l) → SnBr2(s) + TiCl4(l) ΔH = -74 kJ
SnCl2(s) + Cl2(g) → SnCl4(l) ΔH = -195 kJ
SnBr2(s) + TiCl2(s) → SnCl2(s) + TiBr2(s) ΔH = -4.2 kJ

Find the ΔH of the following reaction:
TiCl2(s) + Cl2(g) → TiCl4(l)

2007-10-15 05:34:29 · 3 answers · asked by Anonymous in Chemistry

I'd like to hear from peole with a bachelor's or master's degree in chemistry: how do you find the job market? How easily did you land a job in your field? If you have a job in your field, how good is it? Do you feel it was worth getting the degree?

2007-10-15 05:32:54 · 2 answers · asked by winback 1 in Chemistry

2007-10-15 05:32:39 · 4 answers · asked by Shreemathi T 1 in Chemistry

2,2-Dimethyl-1- bromopropane and bromoethane, both primary alkyl halides undergo SN2. Which one of them would react slower in the reaction and why?

I know that the stronger the nucleophile, the faster the rate of the SN2 reaction, but could someone please explain how to find if one is stronger than another? I know that bromoethane has a simpler structure, but that have anything to do with this question?

Thanks for any help. :-)

2007-10-15 05:32:24 · 2 answers · asked by John D 3 in Chemistry

A triangular park ABC has sides 120cm,80cm and 50cm.A gardener Dania has to put a fence all around it and also plant grass inside.How much area does she need to plant?Find the cost of fencing it with barbed wire at rate of RS 20 per metre leaving a space 3m wide for a gate on one side.




I can find the area but how do i find the cost?

2007-10-15 05:31:08 · 3 answers · asked by Anonymous in Mathematics

In rectangle ABCD, AC = 20, BC = 12, DC = 3x – y. and AD = 2x + y. Solve for x and y. Show all work to receive credit.

2007-10-15 05:30:51 · 2 answers · asked by Anonymous in Mathematics

2007-10-15 05:29:07 · 1 answers · asked by fadel s 1 in Engineering

A 525 g piece of copper tubing is heated to 92.8°C and placed in an insulated vessel containing 47.5 g of water at 39.0°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system (c of copper = 0.387 J/g·K)?

2007-10-15 05:25:16 · 2 answers · asked by divastr186 2 in Chemistry

Just curious if it will interact in any way. Thanks! :-)

2007-10-15 05:22:21 · 9 answers · asked by Faete 2 in Medicine

i am student of 12th standered so tell acc to it.
i shall be thankfull to u

2007-10-15 05:21:42 · 4 answers · asked by angel 1 in Chemistry

Sweaters or tank tops etc?

2007-10-15 05:18:37 · 4 answers · asked by Al 2 in Weather

I know that mushrooms can. Is there anything else? It doesn';t matter if the produce is of good quality, but I'm interested in knowing if you can get anything edible from crops grown in the dark.

2007-10-15 05:18:01 · 22 answers · asked by thedefinitearticle2001 2 in Agriculture

CH2CH3 was axial and H is equatorial, if they were swapped around, would they be constitutional isomers?

The 2 other options are..diff combinations of the same compounds or stereoisomers that cannot be interconverted by rotation around single bonds?

2007-10-15 05:15:35 · 2 answers · asked by Anonymous in Chemistry

2007-10-15 05:15:05 · 7 answers · asked by T.c 1 in Earth Sciences & Geology