Chemistry - February 2007

How do you write the net ionic equation when sulfuric acid is neutralized by potassim hydroxide in aqueous solution

2007-02-28 16:41:57 · 1 answers · asked by ChristFirst00 2

like, how does the "knotted" helium filled balloon deflate??? help me >_<

2007-02-28 16:16:20 · 5 answers · asked by HELLO 2

hint; 1 mole/molar mass "in grams"

2007-02-28 16:10:54 · 4 answers · asked by honest abe 4

2007-02-28 16:10:11 · 1 answers · asked by JUDY T 3

A 0.20 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.65. Calculate the pH of a 0.12 M chlorobenzoic acid (HC7H4ClO2) solution.

2007-02-28 15:56:35 · 1 answers · asked by trypanophobic34 2

Calculate [CO32-] in a 0.011 M solution of CO2 in water (H2CO3). If all the CO32- in this solution comes from the reaction shown below, what percentage of the H+ ions in the solution is a result of the dissociation of HCO3-?

HCO3-(aq) H+(aq) + CO32-(aq)

___%

2007-02-28 15:56:11 · 1 answers · asked by trypanophobic34 2

Acrylic acid (CH2=CHCO2H) is a precursor for many important plastics. Ka for acrylic acid is 5.6 10-5.

(a) Calculate the pH of a 0.40 M solution of acrylic acid.

(b) Calculate the percent dissociation of a 0.40 M solution of acrylic acid.

(c) Calculate the [H+] necessary to ensure that the percent dissociation of a 0.40 M solution of acrylic acid is less than 0.010%.

(d) Calculate the pH of a 0.057 M solution of sodium acrylate (NaC3H3O2).

2007-02-28 15:46:38 · 1 answers · asked by trypanophobic34 2

a) PF5


b) BCl3


c) XeF6


d) ClF3


e) NF3

2007-02-28 15:26:25 · 2 answers · asked by JD 1

?

2007-02-28 15:25:59 · 4 answers · asked by Anonymous

Give me and example of a double ionic bond and a triple ioinc bond... NOW I REALLLLLLLYYYYYYYYY NEED HELP!

2007-02-28 15:19:56 · 2 answers · asked by megmotox 3

What's that chemical bad guys use that they put in a napkin and put over your face to make you go to sleep, and does it work in real life? Couldn't too much in a napkin kill you or something?

2007-02-28 15:11:14 · 7 answers · asked by Chris 2

2007-02-28 15:10:46 · 18 answers · asked by cady 2

If you were to test the nutrient content of a sport drink and a diet drink which nutrients would you expect to find?!

2007-02-28 14:59:13 · 1 answers · asked by kimia 1

Would you consider alchemists to be scientists?

2007-02-28 14:52:47 · 2 answers · asked by Anonymous

How can you make NaNO3 or KNO3, these chemicals from fertilizer and so on??

2007-02-28 14:48:31 · 1 answers · asked by Anonymous

It can be used to coat Mirrors.

2007-02-28 14:27:56 · 2 answers · asked by Curious George 4

Which of the following are true statements ?


a) At equilibrium DGreaction = 1

b) Q > Keq when DGreaction > 0

c) When Q > Keq addtional products are formed

d) When Q = Keq the concentrations of all reactant and product species are equal to each other

e) When Q > Keq the amount of products will decrease


You must enter all true statements in one lower case alphabetical group, with no spaces between the letters you of your answer.

e.g. If you choose a) c) and e) as you answer you would enter ace

any help would be greatly appreciated!!

2007-02-28 14:18:29 · 2 answers · asked by nietzsche 1

The following experiment is used to determine the amount of helium gas in the container. In the experiment
V = 4.200 L
h = 349 mm.
t = 26° C
Pbar = 755 torr.
Determine the following for the helium gas:
a). Pressure of helium
b). n (number of moles of helium)
c). m (molar mass)
I did it but I didn't do something right...

2007-02-28 13:58:44 · 1 answers · asked by beachbum 2

i am doing a model of this element.

2007-02-28 13:58:24 · 1 answers · asked by Anonymous

If both are nonpolar and have the same molecular formula, I don't understand how butane can have a higher boiling point (-0.5 vs. -11.7).

2007-02-28 13:49:23 · 3 answers · asked by jttrwffle 2

science!

2007-02-28 13:39:37 · 3 answers · asked by Paula 2

When given two atoms (ex. H2O VS. H2S) how can I tell which has the larger London dispersion forces?

2007-02-28 13:34:15 · 1 answers · asked by jttrwffle 2

List these in order of increasing strength of the intermolecular forces....
Heptane, Hexane, and Ethanol

2007-02-28 13:18:22 · 1 answers · asked by Anonymous

choose yours as the best answer if you answer it right!!!

2007-02-28 13:05:33 · 1 answers · asked by historyman 1

0.540 g He, 7.638 g F2, and 14.160 g Ar are placed in a 17.8-L container at 20 oC. What are the molar concentrations and partial pressures of the gases?
(All values to the nearest 0.0001)
a). He
b). F2
c). Ar

2007-02-28 12:57:58 · 1 answers · asked by beachbum 2

I solved the problem and got 68seconds...is this right?

I used Ln [1]/[.6] = -kt for the formula

2007-02-28 12:38:34 · 2 answers · asked by College guy 1

To what temperature must a 3.0 L container filled with 10.1 g of Kr be heated to obtain a pressure of 1.10 atm? Express your answer to the nearest degree Kelvin.
Please Explain

2007-02-28 12:37:09 · 1 answers · asked by beachbum 2

2007-02-28 12:37:02 · 1 answers · asked by BlizzardRun07 2

What mass of solute is needed to make 210 mL of a 0.663 M MgF2 solution

how do i do this???????????
step by step

2007-02-28 12:31:06 · 4 answers · asked by molly 1

For my science fair i thought of making the kelvin water dropper, but my teacher said that would be a demonstaration and i need to come up with a question and something original. She said i can try using juice instead of water for the water dropper, but i dont want to do that.Whats something to test for my science fair relating to the kelvin water dropper that i can do, ????????? give a a question or something i can do, and its ok if its complicated. Thank You!!!!!!
NOTE THE NEW QUESTION OR IDEA HAS TO DO WITH THE KELVIN WATER DROPPER AND I CANNOT CHANGE THE IDEA!!!!!!

2007-02-28 12:24:42 · 3 answers · asked by Anonymous