Chemistry - October 2007

the concentrations of the Cl- ions.
Please show all steps.

2007-10-08 10:36:54 · 1 answers · asked by ny_spinner_dan 3

Chemistry question...My instructor said that all we need to know is Latin, which I obviously don't.

2007-10-08 10:28:16 · 4 answers · asked by K 2

The way that chemistry students are usually introduced to the concept of atomic spectra is through a discussion of element "lamps" - like the helium lamp or the hydrogen lamp. (Consider, for example, the images at http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/atspect.html.) I do not understand why splitting the light emitted from these lamps (by using, say, a prism) allows us to see a myriad of colors as opposed to just one color. How do these element lamps energize the electrons in such a way that we see wavelengths of light corresponding to multiple electron transitions instead of just one? (When one conducts a flame test for metallic ions, for example, one sees only a single color, not multiple ones...unless I've got it all wrong.)

2007-10-08 10:26:26 · 1 answers · asked by AxiomOfChoice 2

please answer.

2007-10-08 10:03:39 · 2 answers · asked by eru_desu94 2

The melting point at 1 atm 0.0C
Cwater(s)=2.09 J/g C
Cwater(l)=4.21 J/g C
delta H fus=6.02 kJ/mol
answer in joules

2007-10-08 10:01:17 · 1 answers · asked by unknown 1

2007-10-08 09:59:59 · 1 answers · asked by smarty 1

a nonmetal & nonmetal? metal & metal? nonmetal & metal?

2007-10-08 09:39:29 · 3 answers · asked by Anonymous

Can anyone help me with this chemistry problem?

"The following ioic compounds are dissolved in water. For each of substances below, identify the ions formed ince dissolved in water. Make sure the reactions are all balanced."

HI (aq) -->

K2(SO3)(aq)-->

Ba(NO3)2 (aq)-->

NH4(OH) (aq)-->

H2(SO4) (aq)-->

2007-10-08 09:29:07 · 1 answers · asked by ace33 1

Are they not just the same thing?

2007-10-08 09:24:30 · 2 answers · asked by rhubarbcrumble4 2

2007-10-08 09:19:26 · 3 answers · asked by Anonymous

I wanna know :-

1/ Element being oxidized and product of the oxisation???

2/ Element being reduced, and product of the reduction??

3/ the net ionic equation for the redox reaction.

Please help me :-(

2007-10-08 09:16:53 · 2 answers · asked by Hippocrates1985 1

2007-10-08 09:04:18 · 2 answers · asked by bilinmz 1

I'm shown a molecule, which I have drawn and uploaded here:

http://ul.hamzahkhan.com/files/3/Lignin.bmp

I am asked what the product's structure will be if I react it with
(i) Aqueous NaOH
(ii) Hot, acidified aqueous potassium dichromate(vi)
(iii) Aqueous bromine (Br2 (aq))

Is anybody able to help?

2007-10-08 08:38:15 · 3 answers · asked by Anonymus 2

Calculate the grams of O per one gram of sulfur in sulfur dioxide and sulfur trioxide and use the data to illustrate the Law of Multiple Proportions
explain and show please?

2007-10-08 08:21:05 · 1 answers · asked by JitterBug589 3

I am doing this problem to study but am stuck and would like to know how to do it.

What is the density of hydrogen gas at 19.0 C and a pressure of 1670 psi?

2007-10-08 08:20:19 · 2 answers · asked by Jared W 2

What is meant by charge seperation and how does it apply to resonance?

2007-10-08 07:34:19 · 1 answers · asked by Anonymous

and the same thing except for OXYGEN

2007-10-08 07:01:21 · 2 answers · asked by Kevin L 2

calcium carbonate
sodium hydroxide
hydrochloric acid
nitriz acid
ammonia
alumium oxide
glucose
methall
copper chloride


this would really help with my work, i'd give millions of points to who ever helps me!*
thankyou!


*u only get ten points

:)

2007-10-08 06:55:22 · 6 answers · asked by ALBSTERboomer 3

how can made magnesium chloride from magnesium suphate Thank you

2007-10-08 06:51:54 · 1 answers · asked by U68Y 2

This is for my honors bio. homework

and i like dont get it
she said hint: its not melting.


and i dont
know what it is so
help please :]

2007-10-08 06:51:24 · 6 answers · asked by Anonymous

What are the concentrations of HSO4^- , SO4^2- , and H^+ in a 0.21 M HKHSO4 solution? (Hint: H2 SO4 is a strong acid; Ka for HSO4^- = 1.3 x 10^-2)

2007-10-08 06:47:23 · 1 answers · asked by Tiffany 4

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

4.73X10^-3 moles of MnO4 and1.18X10^-2 moles of H2O2

2007-10-08 06:39:58 · 1 answers · asked by Anonymous

2007-10-08 05:48:41 · 2 answers · asked by Anonymous

2007-10-08 05:45:31 · 8 answers · asked by Smooth 1

Is it possible that H4P2O7 (pyrophosphoric acid)can glow in the night? since it has P2 in the formula. Is it possible I can apply it on a paper and make the paper glow, or what should I do to make H4P2O7 glows in the night? like combine with other chemical, thanks!!

2007-10-08 05:45:04 · 1 answers · asked by H T 1

A certain reaction is spontaneous at 69degC. The enthalpy change for the reaction is 12 kJ/mol. Convert the temperature to K and then enthalpy change to J/mol

2007-10-08 05:39:54 · 1 answers · asked by aaron a 1

How much heat is released when 10.3g of Cs2 and 10.3 g of Cl2 are mixed and react according to the following equation:

Cs2(g) + 3Cl2(g)---> S2Cl2(g) + Cl(2)(g) + CCl4(g)
delta H= -230 kJ/mol

2007-10-08 05:38:33 · 1 answers · asked by aaron a 1

2007-10-08 05:36:06 · 2 answers · asked by shelbylynn8991 1

how do i determine the pH of a solution that is formed by mixing 50ml of .2835M HCl and 75ml of .2558M NaOH

2007-10-08 05:33:00 · 2 answers · asked by ajramos_03 2

If 500 grams of water at 25 degrees Celsius loses 10500 joules of heat, what will be the final temperature of the water?

2007-10-08 05:30:04 · 2 answers · asked by Lannymac 2