Science & Mathematics - 9 February 2007

2007-02-09 21:36:14 · 3 answers · asked by sanjeeva 1 in Physics

2007-02-09 21:33:34 · 5 answers · asked by sanjeeva 1 in Physics

The other day I posted this question and I got put down for not being able to do it. I'm 13 and I'm trying to teach myself this stuff, so I've done a couple. Please just tell me if I'm on the right track or not!

The question is:
Write equations to show how the following changes could be brought about (write inorganic reagents on the arrow)

a) 1-chloropropane from propane
b)ethanal from ethane

What I've tried to do:
--------------------------


a) C3H8 ----(Cl2 UV light)--> C3H7Cl

b)C2H6----(OH- (aq))--->C2H4O

If you could even correct the formulas if I'm (I think I am) wrong, I'd really appreciate it, this chem book is old and doesn't explain it very well.

Thank you sooo much!!!

2007-02-09 21:25:51 · 5 answers · asked by Dark42 2 in Chemistry

g=(2+h) question is (2+h) cubed; need worked out problem, my book says answer is 8+12h+6h(squared)+h(cubed) I don't get it

2007-02-09 21:25:13 · 9 answers · asked by Cassie C 1 in Mathematics

We all have the same DNA structure basically. Let charley chimp have it I say!!

2007-02-09 21:22:45 · 10 answers · asked by Anonymous in Zoology

tangent line can be written in the form y=mx+b where m is.... and b is???

2007-02-09 21:21:20 · 4 answers · asked by dpakx27 1 in Mathematics

2007-02-09 21:17:31 · 4 answers · asked by Anonymous in Mathematics

I am interested in finding out which one is the better quality test for checking nerves after having been told that a PET Scan might actually show up the nerves better. I'm asking this because I'm in the process of trying to figure out what is going on with a pain situation I've had going on for the last 3 months.

2007-02-09 21:15:41 · 8 answers · asked by sokokl 7 in Medicine

We are taught that when we see a star at night,it twinkles because atmospheric disturbances interfere in its path.But,why doesn't it disturb the light coming from the planets?

2007-02-09 21:14:22 · 25 answers · asked by Anonymous in Astronomy & Space

2007-02-09 21:13:07 · 5 answers · asked by Anonymous in Mathematics

2007-02-09 21:12:06 · 27 answers · asked by Anonymous in Zoology

If not, then what is the official definition of a polymer and why wouldn't this fit that criteria?

2007-02-09 21:09:20 · 2 answers · asked by Think. 3 in Chemistry

i want more information with figures

2007-02-09 21:09:06 · 11 answers · asked by venkat r 1 in Astronomy & Space

I just want to make sure again for the 100th time. Ha ha.

2007-02-09 21:07:46 · 2 answers · asked by Pedro C 1 in Astronomy & Space

combining medications above

2007-02-09 21:06:11 · 2 answers · asked by Anonymous in Medicine

I have not noticed any signs of it here anyway

2007-02-09 21:00:47 · 4 answers · asked by vije_ray 1 in Astronomy & Space

2007-02-09 20:58:47 · 3 answers · asked by makealittlelightbulbinyoursoul 2 in Botany

2007-02-09 20:56:58 · 5 answers · asked by Anonymous in Mathematics

I know the answer. The numbers are 24 & 28.

I want to know how to calculate ?

2007-02-09 20:56:24 · 2 answers · asked by Bishu 3 in Mathematics

Why there is no frequency before 87.5 or after 108?

2007-02-09 20:50:01 · 2 answers · asked by khaleel 3 in Engineering

2007-02-09 20:48:04 · 8 answers · asked by shaktirs 1 in Biology

One million argon atoms is__________mol of agon atoms

2007-02-09 20:47:51 · 2 answers · asked by ChristFirst00 2 in Chemistry

why algae living at various depths require different photosynthetic pigments?

2007-02-09 20:46:31 · 3 answers · asked by f12f02 1 in Biology

Calculate the percentage of mass of chlorine in PtCL2(NH3)2

2007-02-09 20:46:02 · 2 answers · asked by ChristFirst00 2 in Chemistry

The Trango Towers are cliffs/pikes. They must be eroded.
Wind erosion bring hoodoos to deserts. It could be that.
However, they are found near glaciers. It could be eroded by glaciers.
HELP!!!

2007-02-09 20:45:58 · 1 answers · asked by Oh noes! 2 in Geography

As we go up in the mountains we are closer to the sun. So it should be more and more hot as we climb. But why it is more cooler in the mountains?

2007-02-09 20:45:57 · 4 answers · asked by khaleel 3 in Weather

2007-02-09 20:38:45 · 2 answers · asked by okiron 1 in Chemistry

and transmit it from space? Imagine....

2007-02-09 20:36:52 · 3 answers · asked by Anonymous in Engineering

There are______molecules of methane in 0.123 mol of methane
(CH4

2007-02-09 20:31:57 · 2 answers · asked by ChristFirst00 2 in Chemistry

1.How many moles of NH3 will be produced by the complete reaction of 1.5 moles of Hydrogen with Nitrogen?

2. How many moloes of Nitrogen are required?

if its possible can you show the process to get the answer

2007-02-09 20:31:25 · 1 answers · asked by aly 1 in Chemistry