Chemistry - March 2007

This has to do with polarity vs. non polarity.

0-1.4 is NP
1.4-1.9 is P
What is the number for ionic bonds? is it greater than 1.7? If it is, then how come its not Polar?

2007-03-04 08:30:08 · 2 answers · asked by Anonymous

burning Mg

Mg and HCI

heating Cu

heating (NH4)2 CO3

H2O2 and Mn02

KI and Pb(NO3)2

heating CuCO3

please
i need help

2007-03-04 08:19:14 · 5 answers · asked by brian f 2

the mass of the water and the beaker is 105 g.What is the density of water ?

write the answer by using GRASP method G-givens R-required A-analyse S-Solve P-Paraphrase

2007-03-04 08:10:17 · 2 answers · asked by crazzy 1

Hi,
I was given this question in chemistry and I am not sure as to what it is g for. "What is the W/V % of a solution made by dissolving 0.135 mg of KBr in 5.00 mL of water?"

Is this asking for concentration or something?

Thanks for any help you can provide

2007-03-04 08:10:10 · 1 answers · asked by vikingdude 2

if you consume pure water..H2O with no other elements in it is it harmful?

2007-03-04 08:05:33 · 11 answers · asked by Anonymous

and analyze types of intermolecular forces between solute (vitaminE)and a solvent??
can u give me one example of it'?

2007-03-04 08:01:54 · 2 answers · asked by katracho4 4

say you have a weak acid and its conj. base, with HCl, does that not product a buffer solution?

2007-03-04 08:00:30 · 1 answers · asked by Anonymous

A balloon is up at an altitude of 6000 ft where the pressure is 605 torr and temperature is 15 degrees Celcius. At sea level, here we're at 25 degrees Celcius with a pressure of 720 torr, what will be the change in volume?

2007-03-04 07:57:01 · 1 answers · asked by Deanna 3

Information including: Chemical Symbol, Atomic #, number of protons, electrons, neutrons, atomic mass, mass #, # of orbitals, # of valence electrons, is it stable or unstable and what type of bond.

Please help.. :)

2007-03-04 07:52:09 · 8 answers · asked by Anonymous

2007-03-04 07:45:14 · 2 answers · asked by londres2424 2

Cu2O
or CuO

equations
CuCO3 → CO2 + CuO
2CuCO3 → 2CO2 + Cu2O + 1/2O2

2007-03-04 07:43:12 · 1 answers · asked by crazystudent11 1

A.) p-nitrotoluene
B.) o-nitroanisole
C.) phthalic anhydride
D.) phenyl benzoate
E.) p-nitrobenzophenone
F.) p-t-butyltoluene

2007-03-04 07:28:39 · 2 answers · asked by augusta 1

2007-03-04 07:10:59 · 5 answers · asked by Narissa J 2

2007-03-04 07:08:40 · 3 answers · asked by Carolina F 1

2007-03-04 06:55:17 · 2 answers · asked by Javier c 1

2007-03-04 06:54:01 · 2 answers · asked by Anonymous

A student performs an experiment to determine the mmass of an unknown gas. A smalll amount of the pure gas is released from a pressurized container and collected in a graduated tube over water at rooom temp. The collection tube containing the gas is allowed to stand for several minutes, and its depth is adjusted until the water levels inside and outside the tube are the same. Explain the purpose of equalizing the water levels inside and outside the gas collection tube.

2007-03-04 06:54:00 · 4 answers · asked by Anonymous

could someone please explain to me how to solve this? thanks
Consider the reaction 4PH3 ----> P4 + 6H2
If in a certain experiment over a specific time period, 0.0048 mol PH3 is consumed in a 2.0L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?

2007-03-04 06:51:04 · 2 answers · asked by sandcastlesinair 1

This question I don't get it.

a. the Cl- ions are attracted to dissolved K+ ions.
b. the Cl- ions are attracted to the partially negative oxygen atoms of the water molecule.
c. the K+ ions are attracted to the Cl- ions on the KCl crystal.
d. the K+ ions are attracted to the partially negative oxygen atoms of the water molecule.
e. the K+ ions are attracted to the partially positive hydrogen atoms of the water molecule.

2007-03-04 06:48:35 · 3 answers · asked by shortydidi03 2

some say its a salt i need in my body

2007-03-04 06:47:36 · 7 answers · asked by Babybear 6

From an equilbrium constant, one can determine:
a. the extent of the reaction
b. the speed of a reaction
c. whether the reaction is endothermic or exothermic

[a] A only
[b] B only
[c] C only
[d] A and C only
[e] A and B only

I know it is not B, and I know it is A, and I'm pretty sure it is A and C, since an endothermic K goes up with higher temps and since and exothermic K goes up with lower temps. However, I'm not sure.

2007-03-04 06:41:59 · 2 answers · asked by Adam C. from Italy 1

2007-03-04 06:38:53 · 5 answers · asked by kat79705 2

A solution contains 0.01 M ethyl acetate, 0.10 M acetic acid and 0.10 M ethanol. For the same equilibrium constant of 2.00, calculate the equilibrium concentrations of ethyl acetate, ethanol, and acetic acid in the solution.

2007-03-04 06:28:21 · 1 answers · asked by Anonymous

Balance this equation!!!

2007-03-04 06:24:42 · 3 answers · asked by Anonymous

Experiment 1- Initial temperature 23C, final temperature 20C
Experiment 2 - Initial temperature 23C, final temperature 26C.

I know that endothermic takes in energy and that exothermic releases it, but I'm not sure how to determine which is which based on the temperatures of the beginning and final product. Can you help?

2007-03-04 06:19:11 · 9 answers · asked by Clean Independent Energy 3

I know that q = Delta T X mass X specific heat (4.18)

Negative Delta T means that the reaction is endothermic because the final heat is less than the initial heat. For a Cool reaction, which is endothermic, the Initial Temperature was 25.5 degrees Celsius and the Final Temperature was 0 degrees Celsius so the environment cooled down because the reaction absorbed heat. If you plug in this negative delta T to the q formula, it yields a negative q. A negative q means that the reaction is exothermic which disproves what delta T tells us by being negative. Can you please explain this as I do not understand it AT ALL? thanks!

2007-03-04 06:17:21 · 1 answers · asked by John S. 1

What methods or theories are known to seperate magnesium oxide into magnesium and oxygen? Is there a process that uses aditional oxygen?

2007-03-04 06:07:27 · 1 answers · asked by dolphinparty13 2

I think it might be used in some neon lights...right?

2007-03-04 06:04:19 · 7 answers · asked by Anonymous

Hi,

I would appreciate it if someone could please tell me how to convert pg/mL to pmol/L?

I need this to convert my blood test results.

Thanks!

Aaron.

2007-03-04 06:01:40 · 4 answers · asked by aarjop 1

I selected letter B. Am I right?

A) Ca
B) Fe
C) F
D) O
E) K

2007-03-04 05:46:19 · 3 answers · asked by shortydidi03 2