Chemistry - November 2007

Cl(g) + O(3)(g) --> ClO(g) + O(2)(g) plays a role in ozone destruction. What is the source of the monatomic chlorine, Cl, in this reaction?

******the NUMBERS in PARANTHESES are supposed to be subscripts. THANKS.

& if you want to be a BIGGER HELP. & get a better chance for BEST ANSWER.....(: please answer this one too, if you have time....


If lye, NaOH, is put in water, the solution gets hot. What kind of energy process is this?

>>>>>>>>

another question: (you don't have to answer if you're bothered by my questions)

- Write a balanced equation for the decomposition of copper (II) oxide.



SORRY FOR MY STUPIDITY.

2007-11-14 14:45:52 · 2 answers · asked by maingedang 5

2007-11-14 14:33:53 · 3 answers · asked by Yaman 1

2007-11-14 14:23:10 · 2 answers · asked by Tonie M 1

Chemistry Questions that I need help on.

2007-11-14 14:16:18 · 1 answers · asked by Tonie M 1

Manganese II nitrate + lead dioxide + nitric acid ----> hydrogen permanganate + lead II nitrate + water


(Could you please tell me the oxidation #'s for the original, too? :) )

2007-11-14 14:14:28 · 1 answers · asked by Anonymous

Standard cell potentials are determined with 1.0 M solutions of ions. In this experiment, we will use 0.10 M solutions of Zn2+, Cu2+, Pb2+, and Ag1+ to minimize the amount of hazardous waste generated. In this series of questions, you will figure out what effect this will have on the voltages you observe.

Consider a cell consisting of a Cu2+/Cu couple, and a Ni2+/Ni couple.

a. Starting with 1.0 M solutions of ions (standard conditions), evaluate Q in the Nerst Equation.

2007-11-14 13:50:20 · 1 answers · asked by flaquita 1

numbers on side are subscripts

2007-11-14 13:34:23 · 2 answers · asked by wearin00 1

Elemental ananalysis of a compound results in the following data
65.45 % C
5.49 % H
29.06 % O

5.51 g of the compound fills a 192.0 ml bottle with a pressure of 4782.0 mm Hg at a temperature of 21.3oC.

2007-11-14 13:29:46 · 1 answers · asked by chem queen 1

. DeltaHvap for the liquid is 23.6 kJ mol-1 at 81°C.
w=?
deltaE=?

2007-11-14 13:28:40 · 1 answers · asked by Joshua K 1

NH3 + O2 → NO + H2O

If the percent yield of the above reaction is found to be 94.20 %

2007-11-14 13:27:55 · 2 answers · asked by chem queen 1

Elemental Boron is produced in one industrial process by heating diboron trioxide with magnesium metal, also producing magnesium oxide.Write the unbalanced chemical equation for this process.

2007-11-14 13:25:52 · 1 answers · asked by Mio 2

Consider the following data.
N2(g) + 2 O2(g) 2 NO2(g) DeltaH = 67.7 kJ
N2(g) + 2 O2(g) N2O4(g) DeltaH = 9.7 kJ
Calculate H for the dimerization of NO2 as shown below.
2 NO2(g) N2O4(g)

2007-11-14 13:25:40 · 1 answers · asked by Joshua K 1

2007-11-14 13:21:52 · 1 answers · asked by jrich 1

The question goes as follows:
"Standard cell potentials are determined with 1.0 M solutions of ions. In this experiment, we will use 0.10 M solutions of Zn2+, Cu2+, Pb2+, and Ag1+ to minimize the amount of hazardous waste generated. In this series of questions, you will figure out what effect this will have on the voltages you observe.

Consider a cell consisting of a Cu2+/Cu couple, and a Ni2+/Ni couple.

a. Starting with 1.0 M solutions of ions (standard conditions), evaluate Q in the Nernst Equation."

OK, so, Q=[products]^coeff/[reactancts]^coeff. I'm figured out th equation to be 2Cu^2+ + Ni<---> Ni^2+ + 2Cu^1+ from the Standard Reduction Potential Table. The Q equation would be= [Ni]/[Cu^2+]^2, right? but I have no idea how to get the Molarities!! Is Cu^2+ 0.1M??? What's Ni?? PLease help!

2007-11-14 13:04:47 · 1 answers · asked by flaquita 1

"wet chemical method" in a chemistry lab


also...please help me with this one if you can!! please

a mixture contains the following cations:

Hg2 +2, Ag+1, Pb +2, Hg+2, Cd+2, Bi+2, Cu+2, Sn+4, Co+2, Zn+2, Ni+2, Mn+2, Fe+2, Cr+3, Al+3, Ca+2, Al+3, Ca+2, Ba+2, Mg+2, Na+1, K+1

Describe the "Classic Scheme" for qualitative analysis of a mixture containing the above cations by seperating them into the five major groups based on solubilities. Descrive briefly the five major groups of ions in reference to solubilities.

2007-11-14 13:00:32 · 1 answers · asked by maria 2

Discuss why there is a meniscus when water is measured in a glass graduated cylinder. Discuss why there is no meniscus when water is measure in a plastic graduated cylinder.

2007-11-14 12:53:56 · 1 answers · asked by Riley 1

I have a chemistry project for school and it is designing a half dollar coin out of any materials we like. We have copper pennies, so i was thinking about a copper half dollar. Is copper a good metal to use for it? Are there any special properties of copper that make it a good metal? Are there any special properties that make it a bad metal? Thanks in advance.

2007-11-14 12:52:04 · 3 answers · asked by Kumar 4

1. Identify the most important interparticle forces in each substance

AlCl3
CH3(CH2)nCH2OH
CCl4
Si
NO
NO2

2007-11-14 12:51:05 · 1 answers · asked by Riley 1

2007-11-14 12:48:07 · 2 answers · asked by APNA 3

The question goes as follows:
Standard cell potentials are determined with 1.0 M solutions of ions. In this experiment, we will use 0.10 M solutions of Zn2+, Cu2+, Pb2+, and Ag1+ to minimize the amount of hazardous waste generated. In this series of questions, you will figure out what effect this will have on the voltages you observe.

Consider a cell consisting of a Cu2+/Cu couple, and a Ni2+/Ni couple.

a. Starting with 1.0 M solutions of ions (standard conditions), evaluate Q in the Nerst Equation.

OK, so, Q=[products]^coeff/[reactancts]^coeff. I'm figured out th equation to be 2Cu^2+ + Ni<---> Ni^2+ + 2Cu^1+. The Q equation would be= [Ni]/[Cu^2+]^2, right? but I have no idea how to get the Molarities!! Is Cu^2+ 0.1M??? What's Ni?? PLease help!

2007-11-14 12:46:42 · 2 answers · asked by flaquita 1

Hi,

A line in the infrared region of hydrogen spectrum has wavelength of 1.093 micrometers. What is the transition responsible for this wavelength?

I tried using (9.112E-8 m) / (wavelength) = (1/nf^2 - 1/ni^2). But how do I solve for two unknowns? Do I assume nf = 1?


Thanks!

2007-11-14 12:40:02 · 1 answers · asked by Anonymous

2007-11-14 12:34:53 · 3 answers · asked by xzoticgreeneyez 1

2007-11-14 12:21:07 · 3 answers · asked by Anonymous

2007-11-14 12:13:34 · 4 answers · asked by xxsoccerchickxx_84 1

Ok, this is kinda confusing so if you have a question i will try to explain more. ( I dont know the answer)

At the first energy level there is -1312 Kj/mole,
2 energy level is -328 kj/mole
3rd is -145.8
4th is -82
5th is -52.5
6th is -36.4
7th is -26.8
8th is -20.5

(They are all negative numbers)

Now we are supposed to take these numbers and find the pattern. They have to do with the energy at each level. This is for my chemistry extra credit, so we are suppose to get help.

If you have any ideas or know the answer let me know.

Thanks

2007-11-14 12:02:14 · 2 answers · asked by Anonymous

I really need a slogan for platinum..!!!!
for example: "Aresenic's a sure fire way to deal with a nasty rat, It works better than a mean old cat."
can some one please help me and give me a slogan for Platinum

2007-11-14 11:36:02 · 1 answers · asked by Anonymous

Calculate the pressure exerted by 0.4962 mol of N2 in a 10.410 L container at 25.0°C. (See Table 5.3.)


Table 5.3
N2 a=1.39 b=.00391

(a) Use the ideal gas law. (Enter your answer for parts a and b using 5 significant figures.)
___atm
(I keep getting this wrong: these are wrong -->1.1162 and 2.3324)

(b) Use the van der Waals equation.
___ atm

2007-11-14 11:21:20 · 1 answers · asked by poo 2

The questions I need answered are-

1- Elements within the same group contain the same ______

and

2- What are the listings of elements in the periodic table based on?

I should know this stuff but I don't and really need help!

2007-11-14 11:08:08 · 4 answers · asked by Chasing Serenity 1

65.45 % C
5.49 % H
29.06 % O

5.51 g of the compound fills a 193.0 ml bottle with a pressure of 4752.4 mm Hg at a temperature of 21.0oC

2007-11-14 10:51:19 · 1 answers · asked by Anonymous

Does wool or nylon or anyother type of thread have a chemical formula if so what is it?

2007-11-14 10:38:54 · 5 answers · asked by curly* 2