Chemistry - March 2007

2007-03-27 13:36:27 · 3 answers · asked by Anonymous

For example, acetic acid has a Ka of 1.77 x 10^-5 and asprin has a Ka of 3.3 x 10^-4. Would asprin be the more acidic of the two?

2007-03-27 13:34:58 · 3 answers · asked by smarty21 3

2007-03-27 13:25:18 · 4 answers · asked by Anonymous

2007-03-27 13:19:28 · 2 answers · asked by Anonymous

It's chemical formula is C11H15NO2

2007-03-27 12:59:51 · 3 answers · asked by Anonymous

In a coffee-cup calorimeter, 62.1 mL of 0.100 M AgNO3 and 62.1 mL of 0.100 M HCl are mixed to yield the following reaction.

Ag+(aq) + Cl -(aq) AgCl(s)

The two solutions were initially at 22.60°C, and the final temperature is 23.39°C. Calculate the heat that accompanies this reaction in kJ/mol of AgCl formed. Assume that the combined solution has a mass of 124.2 g and has a specific heat capacity of 4.18 J/°Cg.

2007-03-27 12:44:46 · 1 answers · asked by navi 2

what is the recipie for making the sodium acetaite found inside the reusable hand warmers

2007-03-27 12:28:29 · 2 answers · asked by Anonymous

Balance the following equation by the half-reaction method in an acidic or basic solution as indicated.


I - + NO2- --> I2 + NO ( acidic )


You must enter the correct coefficients of the above reactants and products as a single group of integers.


Example:

C2H5OH(aq) + Cr2O72-(aq) --> CH3CO2H(aq) + Cr3+(aq)



the balanced equation is

3C2H5OH(aq) + 2Cr2O72-(aq) + 16H3O+(aq) --> 3CH3CO2H(aq) + 4Cr3+(aq) + 27H2O(l)



you would enter 3234 for an answer.

NOTE: only enter the coefficients for the species given in the original equation.


please help, Im really lost with this one

Thanks

2007-03-27 12:28:09 · 2 answers · asked by Specs76 1

Like is it a polar or nonpolar. Is there a easy simple way/s to figure it out. My teacher says that a way is to find if it is symmetrical or not, and the other is find if the atom distribution is equal?

2007-03-27 12:19:22 · 2 answers · asked by mike19235 1

UgH...Redox Reactions!Can someone please explain how I'm supposed to make balanced net ionic equations from this? I don't understand, they are due tomorrow & I'm freaking out b/c I'm so confused! I also have to say which is the reducing and oxidizing agent. My book sucks, and my teacher doesn't teach properly, and I can't find anything helpful online, they are confusing. PLEASE HELP ME! I would really appreciate it! Thank you so much!

1. MnO4 ^ - + C2O4^2- --(H2SO4) ---> ????

2. NO^2- + CrO7 ^2- ---(H2SO4)---> ???

3. CrO7^2- + Fe^2+ --(H2SO4)---> ???

4. I^ - + NO3 ^ - ---(HNO3)---> ????

5. MnO4 ^ - + Fe^2+ ---(H2SO4)---> ????

2007-03-27 12:00:26 · 2 answers · asked by Anonymous

under normal conditions

2007-03-27 11:50:04 · 4 answers · asked by heyletsgocoast 1

water and ether and why is it more efficient to make several extracions using small portions rather than 1 using the same total volume

2007-03-27 11:42:50 · 1 answers · asked by ms_mw_2004 1

Calculate the concentrations of Pb2+ and Cl2 at equilibrium. Ksp for PbCl2(s) is 1.6 10-5.
Pb2+

2007-03-27 11:39:06 · 2 answers · asked by crazzyangel16 1

a water soluble salt

2007-03-27 11:28:24 · 2 answers · asked by ms_mw_2004 1

2007-03-27 11:21:41 · 1 answers · asked by Mary O 1

2007-03-27 11:00:07 · 3 answers · asked by elkazar 1

2007-03-27 10:51:16 · 3 answers · asked by Anonymous

2007-03-27 10:30:29 · 4 answers · asked by ara2680 2

Bonus question what is the densist also?

2007-03-27 10:16:24 · 13 answers · asked by Halox 3

Which of the following are oxidizing agents ?



a) H2O2


b) K


c) Fe


d) Cr


e) C

2007-03-27 09:50:05 · 6 answers · asked by giggles9783 1

im supposed to write a six page paper on physical and chemical changes but describing them and giving examples only takes up one page. i need a subtopic! please help!!

2007-03-27 09:33:58 · 1 answers · asked by daddy f 2

2007-03-27 09:31:08 · 7 answers · asked by john m 1

2007-03-27 09:00:25 · 9 answers · asked by emzy 1

What distinguishes the solubility product, Ksp, from other equilibrium constants?

a. It pertains to a reaction at only one temperature.

b. It is only valid for an equilibrium condition.

c. It deals specifically with sparingly soluble salts.

d. It deals specifically with the autoionization of water.

2007-03-27 08:56:28 · 1 answers · asked by Anonymous

I recently did a chem lab and we made ice cream. We have to answer questions by looking them up online and I can't find this one:

What allows oily butter fat and water to stay mixed in cream?

Pleaseee help me?! I'm lost when it comes to chem so simple language would be greatly appreciated!

2007-03-27 08:36:49 · 2 answers · asked by blueskylvr7 1

2007-03-27 08:34:37 · 3 answers · asked by Baby Gurl 1

2007-03-27 08:31:50 · 3 answers · asked by Baby Gurl 1

At room temperature the following reaction has Kp = 9.48E-10:
2SO2 (g) + O2 (g) (equilibrium arrows/yields) 2SO3 (g)

A closed reaction vessel is initially charged with the following partial pressures: 2.91 atm SO2 and 2.97 atm O2. After the reaction has come to equilibrium, what are the equilibrium partial pressures of all reactants and products?
p(SO2) = ? atm
p(O2) = ? atm
p(SO3) = ? atm

The answers are:
p(SO2) = 2.91 atm
p(O2) = 2.97 atm
p(SO3) = .000154 atm, but I don't understand how?

2007-03-27 08:25:06 · 1 answers · asked by Anonymous

2007-03-27 08:24:35 · 1 answers · asked by Baby Gurl 1

physical science

2007-03-27 08:23:13 · 3 answers · asked by Baby Gurl 1