Chemistry - September 2006

i heard like 110....118 and also of these, how many occur naturally and only how many are really important????

2006-09-18 13:50:58 · 5 answers · asked by Anonymous

2006-09-18 13:49:54 · 1 answers · asked by help 2

ok i need step by step answer i have to teach it to my chem class and i cant really think of any instruction

2006-09-18 13:42:58 · 2 answers · asked by dncrgal55 2

how do u convert the units of metric system using division i was taught original # over base unit which for example grams...so its ...2.4 *10^6 divided by 1g then u then divide into right place i.e. answer of the first divided by 1 kg....i still don't kno how to work that....

2006-09-18 13:39:27 · 1 answers · asked by anh23059 2

2006-09-18 13:18:48 · 5 answers · asked by 103lber 1

2006-09-18 13:18:07 · 7 answers · asked by chingchang 1

i know a solid is something that doesn't change it's shape, i hate chemistry, but my son has to draw a solid that's in his house, i don't know what to tell him, he said water, but i told him no, my husband told him the table, but i said no, bcus it's shape will change once u burn it, i don't want to send him in the wrong direction, so please help. thank u :)

2006-09-18 13:13:08 · 10 answers · asked by tear drop 4

2006-09-18 12:56:12 · 17 answers · asked by 103lber 1

2006-09-18 12:47:01 · 6 answers · asked by tear drop 4

2006-09-18 12:46:30 · 2 answers · asked by wild_turkey_willie 5

include measures already undertaken by various governments and a disscussion of the impacts of your proposal

2006-09-18 12:37:02 · 4 answers · asked by J_B_BaLlin 3

2006-09-18 12:33:05 · 9 answers · asked by Anonymous

2006-09-18 12:03:56 · 4 answers · asked by Dude 1

2006-09-18 11:53:46 · 4 answers · asked by Sara 1

ok. its me again with the atomic bomb questions. um...oh yeah! since everyone says that there are still atomic bombs left, then the ? is will they every be used again? ok. gracias una vez mas! :)

2006-09-18 11:41:06 · 5 answers · asked by Emily 1

ok. are there atomic bombs out there today? dont worry, im not trying to blow up the world. i have a project so i kinda need this info quick! gracias!

2006-09-18 11:25:47 · 10 answers · asked by Emily 1

I am doing a science fair project and I need some help.

2006-09-18 10:55:12 · 4 answers · asked by Anonymous

2006-09-18 10:48:24 · 2 answers · asked by yaknow 1

I believe it is an open system.

2006-09-18 10:42:15 · 9 answers · asked by dsds 1

how do i determine which atom bears the negative end of a bond?
Im working with:
I-H
S-B
As-N

2006-09-18 10:28:50 · 3 answers · asked by No Know 4

im having trouble on naming chemical compounds... metal-nonmetal, nonmetal-nonmetal... i just dont understand them so if there are any tricks to the trade that would be useful.
Ex: CS2 would it be Carbon disulfide? Carbon (II) Sulfur i dont know..

2006-09-18 10:26:44 · 2 answers · asked by No Know 4

Calculate the mass in g of two solutions if one has a volume of 63.08mL and a density of 1.10 g/mL and the second has a volume of 61.67 mL with a density of 1.0225 g/mL. Express your answer correct to the appropriate number of significant figures.

2006-09-18 10:22:34 · 1 answers · asked by Anonymous

A solution containing 45.03g of liquid A and 17.55g of liquid B has a density of 1.904g/mL. On adding further 19.40g of liquid B to the mixture, the density drops to 0.972g/mL. Assuming that the volumes are additive, calculate the density of liquid B in g/mL.

2006-09-18 10:18:43 · 1 answers · asked by Anonymous

2006-09-18 10:06:38 · 4 answers · asked by mikeworth62 1

Road salt on steel that will be put into a foundry oven.

2006-09-18 09:24:05 · 1 answers · asked by wyld_fire37 1

2006-09-18 09:17:05 · 12 answers · asked by jboxman7 2

Explain how you could distinguish between a sample of 1bromopropane and 2 bromopropane using:
a) infra-red spectroscopy
b)low-resolution proton n.m.r spectroscopy

2006-09-18 09:11:01 · 4 answers · asked by The d 1

Although the relative molecular mass of bromoethane is 109, there is no peak at m/z=109 in its mass spectrum. Equally sized peaks at m/z=108 and m/z 110 do, however occur. Explain these observations.

2006-09-18 09:06:47 · 3 answers · asked by The d 1

2006-09-18 08:59:04 · 6 answers · asked by kevin d 1

Hi I work for a small company and need some help.
My predesesor left me with some VERY poor notes.
we use a small part that has been nickle plated.
The nickle must be removed on one portion only.
This is done with a sulferic acid bath lined with lead and energizing the part as the cathode @ 17 volts DC for twenty minutes.
Typically after the deplating proccess I apply one drop of nitric acid to the desired area to be deplated. I then wipe off the nitric acid with a small piece of filter paper.Then I place one drop of the indicator solution on the filter paper and check the color of this reaction.(brown= good) (red=nickle still present)
My problem is I am almost out of indicator solution and I can not determine it's make up.
I have a list telling me what the make up is but only have been able to identify two of the four chemicals involved.

indicator solution;
10 grams-NH4CH2COOH = Unknown
60 ml. - CH3COOH = acetic acid glacial
1 gram - DICH3COOH = Unknown
30 ml. - NH4OH = ammonium hydroxide

Any ideas as to what my unknowns are?

ANY HELP WOULD BE GREATLY Appreciated

2006-09-18 08:55:42 · 2 answers · asked by Anonymous