Chemistry - October 2007

2007-10-13 10:07:22 · 2 answers · asked by Anonymous

ya

2007-10-13 09:43:46 · 2 answers · asked by lasfklaf; 1

An electron in the third excited state of the hydrogen atom has n = 4

true or false

2007-10-13 09:04:38 · 2 answers · asked by Anonymous

2007-10-13 08:42:48 · 2 answers · asked by Anonymous

How does this work

4d (sub)xy and 3p (sub)y are written in orbital notation. what does sub xy and y mean? I am used to numbers followed after d and p.

2007-10-13 08:36:55 · 1 answers · asked by Anonymous

What are the most reactive metals and where are they found on the periodic table??

2007-10-13 08:12:20 · 3 answers · asked by hello 1

Answer for below questions for the following ion

(N)2^-2

i believe it's called dinitrogen (with a -2 charge) or just (nitrogen)2 with a -2 charge

How many valence electrons does the ion have ?



How many electrons are in bonding orbitals ?



How many electrons are in anitbonding orbitals ?


What is the bond order of the ion.
Enter an integer or a decimal fraction e.g. 1 3.5

2007-10-13 07:15:23 · 2 answers · asked by gotMUNCH 2

hypothesize what oxidation states exist for chromium, and use electron configuration evidence (etc.) to support your answers.

2007-10-13 06:57:50 · 3 answers · asked by Anonymous

a. Cr(NO3)3 + 4H2O --> CrO4 (-2) + 3NO3 (-3) + 8H (+) + 3e-

b. Cr(NO3)3 + 10H (+) --> CrO4 (-2) + 3N (5+) + 5H2O + 3e-

Im not sure if im dealing with the Nitrogens appropiately.

2007-10-13 06:42:15 · 2 answers · asked by Chris D 1

2007-10-13 06:33:41 · 2 answers · asked by Anonymous

2007-10-13 06:31:43 · 1 answers · asked by Anonymous

A. Decreasing the pressure
B. increasing hte temperature
C. decreasing hte movernment of particles
D. INCREASING THE dynamic equilibrium

2007-10-13 06:30:50 · 3 answers · asked by ygq9123 1

what happens to the open bonds that are created as neighboring sugar molecules lost component atoms during dehydraton synthesis?

2007-10-13 06:18:53 · 1 answers · asked by nicolehasacat 1

the internal energy of the gas remains constant?
no work is done on the gas?
the temperature of the gas does not change?
no heat is supplied to or removed from gas?
none of the above choices are true?

2007-10-13 05:30:40 · 2 answers · asked by sexyb18 1

PROBLEM: how do charged objects interact with each other?

how did identical charged objects interact with each other? For example, how did one charged comb interact with the second charged comb?
PLEASE HELP I WOULD SO APPRACTIATE IT
like :
plastic comb (charged object in hand)
plastic comb(Charged object on watchglass)

How did differently charged objects interact with one another?
Conclusion:
how do neutral objects interact with charged objects?

how do charged objects interact with other charged objects?

How is this information useful in society?

2007-10-13 05:02:56 · 2 answers · asked by Anonymous

2007-10-13 01:48:48 · 3 answers · asked by Anonymous

.

2007-10-13 00:40:16 · 4 answers · asked by kicksinstyle23 1

please tell me one ion detailing its function...
and what is it medical information

2007-10-12 20:06:06 · 1 answers · asked by †ciminod† 1

I have a solution of methyl red which is 3.27x 10^ -4 M that is prepared by diluting 10 mL to 100mL. What is the concentration?

Is doing (3.27x10^-4)(.01)= x(.1) to solve for the concentration the right way?
= 3.27x10^-5

Thanks in advance!

2007-10-12 19:26:09 · 3 answers · asked by Bob Sanders 2

2007-10-12 17:56:36 · 3 answers · asked by Anonymous

I desperately need a formula 2 calculate
% of covalent character in an ionic bond...
and secondly...please tell me why the bond angle of BF
3
is max as compared 2 other halides of boron...

2007-10-12 17:32:31 · 1 answers · asked by Anonymous

Dalton's atomic theory was not correct in every detail. Should this be taken as a criticism of Dalton as a scientist? Explain

2007-10-12 16:08:06 · 4 answers · asked by Anonymous

Q = m(triangle)TCp 
I know it has to do with energy.
What does each variable stand for? What unit would Q be in?

It can also be writen as:
q = (m) ([triangle]T) (Cp)

2007-10-12 15:43:34 · 2 answers · asked by Jonathan 3

From Point Blank....What Is Oxidation/Oxidation States
and what exactly is the point of them???
*please explain in detail*

2007-10-12 14:54:34 · 4 answers · asked by Anonymous

Silver, being one of the best conductors of electricity, is used in the electrical wiring for high-end stereo equipment. What would the temperature be of a 0.325 kg silver conductor that has been carrying a current for two hours? The specific heat of silver is 0.23 J/g C, the wiring is at a temperature of 23° C and it absorbs 3.45x103 J of energy.

A 5.00 g calorimeter, c=15.77 J/g °C, is used to measure the heat capacity of an unknown metal. The 8.60 g unknown metal is first placed in a boiling water bath for several minutes then placed in the calorimeter. The calorimeter has 151 g of 23° C water in it. If the final temperature of both the metal and the water is 52° C, calculate the heat capacity of the metal.

How would you work these two problems?

2007-10-12 14:51:14 · 1 answers · asked by surferchic 2

2007-10-12 14:13:36 · 3 answers · asked by ladonnataylor2003 1

Based on einstien's explanation of the photoelectric effect, why does increasing the intensity of the light source used in the experiment not cause the photoelectric effect to happen?

2007-10-12 11:26:05 · 3 answers · asked by Anonymous

Crude gunpowders often contain a mixture of potassium nitrate and charcoal (carbon). When such a mixture is heated until reaction occurs, a solid residue of potassium carbonate is produced. The explosive force of the gunpowder comes from the fact that two gases are also produced (carbon dioxide and nitrogen), which increase in volume with great force and speed. Write the unbalanced equation for the process.

2007-10-12 10:58:04 · 4 answers · asked by lindaalicious 3

Answer for below questions for the following ion (F2+)
a)How many valence electrons does the ion have ?
b)How many electrons are in bonding orbitals ?
c)How many electrons are in anitbonding orbitals ?
d) What is the bond order of the ion?

2007-10-12 10:26:01 · 1 answers · asked by physicsisgay 2

A. 3x10^-8

B. 6.7x10^3

C. 8.7x10^-5

D. 25.67x10^-2

2007-10-12 09:44:07 · 10 answers · asked by Anonymous