Chemistry - February 2007

There are 3 main points of the answer

2007-02-03 20:11:54 · 6 answers · asked by Flying killer 1

The density of ice is 1.00g/cm3
What is the volume of steam produced when 1 cm3 of ice is heated to 323 degreesCelcius (596K)at a pressure of one atmosphere (101kPa)?
[1 mole of gas occupies 24.0 dm3 at 25 drgrees C(298K) and 1 atmosphere.]

2007-02-03 20:10:19 · 1 answers · asked by plolol 2

2007-02-03 20:09:08 · 2 answers · asked by noor amalina 1

2007-02-03 19:35:14 · 5 answers · asked by Anonymous

2007-02-03 19:32:17 · 4 answers · asked by Anonymous

2007-02-03 19:15:14 · 6 answers · asked by CR7 3

Need the answer ASAP please

2007-02-03 19:00:13 · 4 answers · asked by Anonymous

How many isomers of the alkene pentene C5H10 are there?


How many isomers of C4H10O are there? How are they classified?

2007-02-03 18:58:06 · 2 answers · asked by Nodoudt 2

Is the electron configuration the same as N2?
If so can the unshared pair on carbon be neucleophillic?
_
If so can [HCO ]+ be formed?

2007-02-03 18:41:51 · 3 answers · asked by Roy E 4

Ethylene(C2H4) can be prepared by heating hexane (C6H14) at 800 C.

C6H14---> C2H4 + other products

If the percent yield of ethylene production is 42.5 %, what mass of hexane must be reacted to produce 481 g of ethylene?

2007-02-03 18:16:48 · 1 answers · asked by Alan l 1

Idk what course to take in high-school.

2007-02-03 17:49:47 · 7 answers · asked by Anonymous

This is for general interest, NOT because I am planning to order it. My son is researching potential careers in his 8th grade class, and he has an interest in pyrotechnics. He's learned a lot about the school subjects, degrees, experience, training, and licenses required. He's found out some interesting careers he could pursue as a pyrotechnician. He's putting a career poster together for display at school. He's using RDX as one of his example chemicals, and would like to add catalog pages to his display; also provide the names of some scientific supply houses if possible.
Thank you for any help!

2007-02-03 17:37:07 · 1 answers · asked by purplesometimes 4

Coffee makers and kettles eventually become clogged with a build up of "scale" from deposits of calcium carbonate and magnesium carbonate.

2007-02-03 16:58:04 · 1 answers · asked by Cutie 4

2007-02-03 16:34:36 · 9 answers · asked by ellen105 2

2007-02-03 16:11:58 · 1 answers · asked by ke k 1

I'm in 2nd semester general chemistry, and while I understood the majority of the topics we covered in 1st semester, acids and bases are killing me!

1. Am I missing something obvious, or is the topic just inherently hard?

2. Any recommendations for websites that I could try to learn from? I need to start from the very basics.

Example of a problem I can't do:

Calculate the pH of a buffer solution made by mixing 25.00 mL of 0.2 M sodium acetate and 25.00 mL of 0.1 M HCl.

2007-02-03 16:07:46 · 2 answers · asked by Cat H 1

2007-02-03 15:57:18 · 10 answers · asked by Dilip M 1

home made liquid hand soap

2007-02-03 15:55:01 · 2 answers · asked by Nenel S 1

2007-02-03 15:53:11 · 3 answers · asked by cal9492 1

can someone please explain to me redox? more importantly though can anyone explain to me how to do stoichiometry??

2007-02-03 15:46:58 · 4 answers · asked by David M 2

Hydrofluoric acid, reacts with sodium hydroxide to form a compound tht is used in toothpaste to pervent cavities. What is the nae of the compound?

2007-02-03 15:16:05 · 9 answers · asked by Cutie 4

suppose you have 2 containers, one containing a dilute acid and a dilute base, but there are no labels onn them. Describe how you could use red cabbage to determone ehich solution is which.

2007-02-03 15:14:34 · 1 answers · asked by Cutie 4

It is thought that pain results from a change in the pH of the fluid thar surrounds nerve cells. The fluid within your cells is slightly acidic, so a cut or burn releases this fluid and cause pain signals from your nerve endingd. What would you expect to find if you tested the pH creams and lotions used to treat cuts or burns?

2007-02-03 15:12:40 · 4 answers · asked by Cutie 4

2007-02-03 15:02:38 · 7 answers · asked by aaron c 1

I've been thinking and rethinking this problem for about 30 minutes now. I thought it would be less time consuming to ask some one who knows what their doing for help lol If you could explain the right answer


A pure substance, above its melting point, is in a high pressure cylinder. UPon opening a valve on the cylinder a gas escapes. A pressure gauge on the cylinder shows a pressure of 56.5 atm, at 20 Celsius before opening the valve. After removing 10 ft cubed of the gas, measured at standard conditions, the pressure in the cylinder reads 56.5 atm at 20 Celsius. The pressure gauge is in good working order. WHich best explains these observations?

A. The cylinder and contents will weigh the same before and after opening the valve.
B. The substance in the cylinder is in the gaseous state.
C. The substance in the cylinder is mostly in the liquid state.
D. The substance in the cylinder has diatomic molecules when in the gaseous state.
E. The substance in the cylinder is oxygen.

2007-02-03 14:23:15 · 1 answers · asked by gravytrain036 5

2007-02-03 14:13:27 · 4 answers · asked by Jane 2

why was the SI unit of measure created?























and why is the metric system better to use than english.

2007-02-03 14:01:05 · 4 answers · asked by missunderstood 2

2007-02-03 13:46:50 · 2 answers · asked by KutiiTabooty93 1

2007-02-03 13:39:55 · 4 answers · asked by shamrock 1

2007-02-03 13:39:27 · 1 answers · asked by Anonymous