Chemistry - January 2007

please help

2007-01-17 11:49:13 · 3 answers · asked by Anonymous

Ok well I just started some bullshit about kibetic energy and joules and I'm totally lost heres one of the problems...

The mass of the average car is around 1,500 kg. What is the kinetic energy in joules associated with the average car traveling on the interstate at 65 mi/h (29 m/s)?

PLEASE EXPLAIN HOW TO SOLVE! PLEASE!!

2007-01-17 11:48:16 · 4 answers · asked by Tracey Lee ♥ 2

My chemistry class was doing Hydrophobic and Hydrophylic substances (as in soap molecules). Someone asked the teacher the above question and he had no idea of the answer. Does anyone know the composition?

2007-01-17 11:47:08 · 2 answers · asked by Bilko! 2

C3H8 + 5O2 --> _________ + ________
H2O + K2O --> __________
Ba(OH)2 --> ___________ + ____________
Na2CO3 --> _________+ __________

2007-01-17 11:44:23 · 3 answers · asked by I ♥ me 4

2007-01-17 11:41:42 · 1 answers · asked by Anonymous

give an example of each for H20... a physical property, chemical property,physical change, chemical change,

2007-01-17 11:39:19 · 1 answers · asked by Mexfetus 2

Why is it that when I have a very small amount of acetylene in a test tube and have a small flame by it so oxygen will react with it, there is a popping sound.

This is complete combustion

2007-01-17 11:35:17 · 2 answers · asked by footballer1001 1

Preparing a mildly caustic drying agent

2007-01-17 11:32:42 · 2 answers · asked by Anonymous

I need to get the names of these chemical formulas. btw, the numbers are suppose to be subscripts.

MgCl2----------Magnesium Chloride

Ag3P------------Silver Phosphoride

AlP---------------Aluminum Phosphoride



theres those other name endings like these: -ate, ide, ite, um.
when do i know which ending to use? btw, are my answers correct so far?

2007-01-17 11:25:27 · 6 answers · asked by funkypolak17 3

periodic table

2007-01-17 11:13:53 · 2 answers · asked by keke 1

I need to know this so i could keep on doing my H.W correctly.?
I need to know this so i could keep on doing my H.W correctly.

Cu(NO3)2

is there 1 Cu
2 N
6O

2007-01-17 11:04:23 · 4 answers · asked by Ballerina 5

How come when i have a a test tube half filled with acetylene and when it reacts with oxygen black residue (carbon) is produced on the top of the test tube. Whereas when I have a test tube full of acetylene reacting with oxygen the whole test tube gets black residue.

These are both incomplete combustions

2007-01-17 10:52:30 · 5 answers · asked by footballer1001 1

How do you find the Na+ ion concentration in a solution of .75Molarity Na2CO3? Any help is appreciated.

2007-01-17 10:49:46 · 3 answers · asked by jreed3590 2

which has the highest content of electrolytes -salt solution or lemon juice

2007-01-17 10:45:20 · 4 answers · asked by Anonymous

science / HOMEWORK HELP FAST AND NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2007-01-17 10:39:29 · 3 answers · asked by keke 1

2007-01-17 10:38:08 · 3 answers · asked by roxya153 4

I need to know this so i could keep on doing my H.W correctly.

Cu(NO3)2

is there 1 Cu
2 N
6O

2007-01-17 10:35:49 · 1 answers · asked by Ballerina 5

1. The smallest part of the element that has all the elements properties is?
2. A chemical change occur when?
3. The state of matter in which atoms are held together strongest is?
4. What is different between physical and chemical change?
5. What holds the atoms in a molecule together?

2007-01-17 10:25:58 · 4 answers · asked by Jackie 2

The question I have is about organic syntheses of molecules. If a synthetic route to a molecule takes 5 steps and each step is 90% efficient, what's the overall yield? One example I found was 10 steps at 80% efficiency equaling a 10% overall yield, but didn't show how this is calculated. Anyone have any ideas???

2007-01-17 10:17:25 · 2 answers · asked by isabelle archer 2

2007-01-17 10:11:40 · 4 answers · asked by behailubgu 1

anyone know any good websites to help with this...have been on a few but they are as confusing as the book..thanks

2007-01-17 10:01:27 · 1 answers · asked by Anonymous

(I3)^ -1 -----> (I)^ -1 + (IO3)^ -1 , under acidic conditions. .....plzz show ur work !

2007-01-17 09:47:37 · 2 answers · asked by silver_star 1

Thanks

2007-01-17 09:43:29 · 2 answers · asked by Lisa 1

method for the rate of reactions of metals with acids??

2007-01-17 09:42:00 · 5 answers · asked by HelloSunshine:) 2

2007-01-17 09:39:41 · 3 answers · asked by computertrail 1

How long would it take for a sheet of paper to catch on in an average microwave? Also, how long would it take for an average label, or sticker?

2007-01-17 09:36:51 · 1 answers · asked by Nin10dude 6

The question is:

The aluminum sulfate hydrate [Al2(SO4)3*x H2O] contains 8.50 percent Al by mass. Calculate x, that is, the number of water molecules associated with each Al2(SO4)3 unit.

2007-01-17 09:34:35 · 1 answers · asked by Kathryn S 1

2007-01-17 09:30:59 · 6 answers · asked by jesslia 2

2007-01-17 09:14:45 · 8 answers · asked by Anonymous

In chemistry today, we did a flame test. For the lab report conclusion, there are a few questions that I do not know the answer to. If you can help with any of them, that would be greatly appreciated.

1. Explain the reason potassium was visible when using the cobalt glass.

2. Explain the effect of the nitrate ion in solution on the color emission.

3. Give at leasr two reasons why the flame test is sometimes invalid.

4. What other means of qualitative analysis are used to identify metals?

2007-01-17 09:08:34 · 3 answers · asked by kaymay09 4