Chemistry - October 2007

2007-10-09 11:15:43 · 1 answers · asked by Cj 1

This is for a science project :)

2007-10-09 11:06:07 · 8 answers · asked by Anonymous

Like in the industry

2007-10-09 10:40:06 · 2 answers · asked by Anonymous

A student carelessly allows some aluminum tongs to sit a beaker containing CuCl2 solution for a period of tim and a reaction occurs.
The original mass of tongs : 85.1 g
Final mass of tongs: 73.2 g

a) calculate the moles of atoms of aluminum reacted.
b)calculate the number of atoms of aluminum that reacted.
c) Calculate the moles of atoms of copper that are produced. (Hint: use ratio)
d) Calculate the mass of copper that is produced

2007-10-09 10:38:05 · 1 answers · asked by Anonymous

which is easier to make a model of and what materials should i use

ps best answer recieves 10 points

2007-10-09 10:14:24 · 6 answers · asked by Mr. Point Gurad-rifict 2

The following should be true or false

Ionic bonds always produce giant ionic structures
ions in a giant ionic structure are loosely packed together
ionic compounds disolve to form solutions that conduct electricity

2007-10-09 10:06:12 · 1 answers · asked by dwiendle 1

Hi,
I need to make sure I am doing this right..
Question: hybridisation of carbon-3 in 1-butene?
Answer: sp3

Question: hybridisation of carbon-1 in propanal?
Answer: sp2

am I right so far?

2007-10-09 09:57:14 · 1 answers · asked by Anonymous

What is the balanced chemical reaction for the reaction used to calculate the standard enthalpy of formation of CaCO3(s)?

2007-10-09 09:49:30 · 1 answers · asked by Anonymous

When NaOH(aq) and CaCO3(aq) are mixed what precipitate forms and what color

same question with
NaOH and KCl
NaOH and K2CrO4
CaCO3 And KCl
CaCO3 and AgNO3
CaCO3 And K2CrO4
KCl And K2CrO4
AgNO3 and K2CrO4

I am having trouble making my table of knowns for a qualitative analysis lab, if someone could do at least some of these it would be very helpful.

2007-10-09 09:46:38 · 1 answers · asked by daniel T 3

An initial .38 moles of POCl3 are placed in a 3.3 L container with initial concentrations of POCl and Cl2 equal to zero. What is the final concentration of POCl3? ( you must solve a quadratic equation)

1. final concentration = .219 M
2. final concnetration = .0526192 M
3. final concentration = .089 M
4. final concentration = .334152 M
5. final concentration = .0263096 M

2007-10-09 09:17:37 · 1 answers · asked by yakov59 1

Cs isotpe 135

2007-10-09 08:42:02 · 6 answers · asked by Anonymous

My vet prescribed L-Lysine for my cat's sneezing (herpes). She told me to purchase a bottle from a drugstore and give 250 mg twice daily.

I just read online that Propylene Glycol is dangerous for cats to consume.

The L-Lysine tablets that I have have "Polyethylene Glycol" listed in the ingredients.

Is this the same thing as Propylene Glycol? Could it be harmful for my cat? Or is it something different?

I plan to stop giving it to my cat for now until I can consult my vet, but I'd love to hear any answers! Thank you very much!

2007-10-09 08:28:17 · 7 answers · asked by nursemarie 3

2007-10-09 08:23:07 · 5 answers · asked by Anonymous

This link is to the picture of the molecule needed to answer this question.

http://i23.tinypic.com/10yhtt3.gif



a) The C=C bond should be the strongest bond in the molecule

b) The bond between carbon and nitrogen should be the strongest bond in the molecule

c) The C=C bond is more polar than any of the C-H bonds

d) The C=O bond is more polar than the C-C bond

2007-10-09 08:10:12 · 4 answers · asked by T-BuKeTz 2

The poison gas phosgene reacts with water in the the lungs to form hydrogen chloride and carbon dioxide. The equation is

COCl2 + H20 -------> 2HCl + CO2

State the molecular, molar and mass relationship indicated by this equation?

2007-10-09 08:09:43 · 2 answers · asked by evilshenanegans 1

Which halogen atom is most electronegative?




a. bromine

b. chlorine

c. fluorine

d. iodine

2007-10-09 08:08:19 · 5 answers · asked by ee101202 1

In the thermit reaction, aluminium displaces iron from iron(III) oxide.

Write a balanced equation

A mass of 8.38g of iron was produced. Calculate the amount of iron (III) oxide that reacted. (Ar Fe - 55.9)

And calculate to two decimal places the mass of aluminium that was used up in displacing iron from its oxide.

Use values (Al = 27.0g) (O=16)

2007-10-09 07:54:31 · 2 answers · asked by Anonymous

2007-10-09 07:50:49 · 2 answers · asked by jnester0289 1

Write a net ionic equation for the reaction that occurs when aqueous solutions of perchloric acid and potassium hydroxide are combined.

please help

2007-10-09 07:49:03 · 1 answers · asked by turk6060 3

Calculate the molar mass of a gas at 370. torr and 45°C if 183 ng occupies 0.206 µL.

2007-10-09 07:40:32 · 3 answers · asked by jnester0289 1

I had a quiz and that was one of the questions on it. I want to know if I got it right...

2007-10-09 07:37:27 · 3 answers · asked by 23chromosomes 4

Hi what multistep synthesis (with intermediates) would be the fastest way to yield this product?

Reaction can be found below. Thanks!!

http://img219.imageshack.us/img219/1893/38545677pn9.gif

2007-10-09 07:27:24 · 1 answers · asked by Anonymous

Hi, what reagents (with intermediates) would be the fastest for synthesis of this reaction? Reaction linked below. Thanks in advance!

http://img234.imageshack.us/img234/641/98781759kf1.gif

2007-10-09 07:25:06 · 1 answers · asked by Anonymous

What means power of hydrogen and is a scale with a range of 0-14 on which 0-6 are acids, and 8-14 are bases?

Name the substance capable of indicating whether a compound is an acid or base.

What do all bases have in common, produces the properties of bases, and turns red litmus paper blue?

Name the process by which acids and bases are mixed together to form a neutral substance.

What do all acids have in common, produces the properties of acids, causes reaction of acids with metals, and turns blue litmus paper red?

2007-10-09 07:23:38 · 1 answers · asked by Anonymous

Hi, what are the intermediates for each reagent? Thanks!
Reaction can be found at

http://img228.imageshack.us/img228/7318/20996726rb0.png

2007-10-09 07:21:11 · 3 answers · asked by Anonymous

A reactant R is being consumed in a first order reaction. what fraction of the initial R is consumed in 4.0 half lives? What is the equation to follow, or how do you get that answer?

2007-10-09 07:17:53 · 3 answers · asked by anners 1

2007-10-09 06:55:46 · 6 answers · asked by Emily 2

I have seen Mood Rings & other types of Mood Jewelry that have a bubble in the liquid-crystal which is encased in the dome. What exactly is going on with the liquid-crystal when that happens? Thanks in advance to All who Answer here.

2007-10-09 06:49:28 · 3 answers · asked by ? 6

2007-10-09 06:07:02 · 5 answers · asked by Anonymous

can someone tell me importance use and purpose of organosilicons in chemistry

2007-10-09 05:52:18 · 1 answers · asked by sweety s 1