Chemistry - March 2007

what is the equation of Isopently valerate for its saponification

2007-03-12 15:27:11 · 3 answers · asked by kbirdseye15 1

I need to calculate the pH of distilled water with added 6M HCl

2007-03-12 15:25:52 · 3 answers · asked by p_rob22 1

I have appx. 26,000 feet of steel wire with a copper outer layer. I estimate the copper to be 20% of the total weight per foot. What would be the easiest way to remove the copper from the steel?

2007-03-12 15:22:35 · 1 answers · asked by inmissouri2003 2

um i'm having trouble with this question. i also need two examples of each.

2007-03-12 15:16:58 · 6 answers · asked by ggirl 1

containing 400-mg of Al(OH)3

*Al= 29.98 amu, O= 16.00 amu, and H= 1.008 amu

your help with step by step detail please, thank you.

2007-03-12 15:02:59 · 1 answers · asked by xxxladyxxx 1

2007-03-12 14:57:57 · 1 answers · asked by Anonymous

2007-03-12 14:53:15 · 4 answers · asked by Anonymous

2007-03-12 14:51:43 · 6 answers · asked by JH 1

2007-03-12 14:50:55 · 1 answers · asked by Ricky 1

The reaction" NO + 1/2Br2 > NOBr is second order with respect to NO and first-order with respect to Br2. The rate constant is 1.33 x 10^-4 L^2/mol^2/min.

What is the rate expression for this reaction?

2007-03-12 14:45:27 · 1 answers · asked by NightKast 1

2007-03-12 14:37:56 · 2 answers · asked by jmesmith 1

2007-03-12 14:36:25 · 2 answers · asked by Ricky 1

...freezing at -20 degrees celsius?

I just need to know what formula to use and how to set it up.
Don't do it for me please.

2007-03-12 14:35:05 · 1 answers · asked by MP5 3

2007-03-12 14:32:56 · 1 answers · asked by lg 2

I keep getting the answer "4.8360954e14" and it is wrong. I'm multiplying the weight of benzoic acid (122.12926) with 3.96e18 and then converting into mircograms (1e-6 micrograms=1 gram). am i doing all of this right?

2007-03-12 14:18:40 · 2 answers · asked by SKI THE EAST 4

Calculate the pH of a 0.120 M solution of NaNO2

HINT: find Kb from Ka of the conjugate acid

2007-03-12 14:14:44 · 1 answers · asked by checa1215 2

Relate it to its bonding, physical properties and anything that relates to it

2007-03-12 14:12:47 · 2 answers · asked by honeymopsy 1

10.0 g of a fuel are burned under a calorimeter containing 200.0g of H2O. The temperature of the water increases from 15.0 C to 55.0 C. calculate the total heat produced in Joules adn the heat of combustion per gram of fuel

2007-03-12 14:12:17 · 1 answers · asked by kr 1

element information needed.

2007-03-12 14:09:00 · 2 answers · asked by Anonymous

2007-03-12 14:01:21 · 1 answers · asked by College guy 1

what kind of bond is formed between hydrogen and oxygen.?
and how is it different from an "ionic bond"?

2007-03-12 13:56:50 · 3 answers · asked by Tangoant 1

Temp change in relation to evaporation as in, putting filter paper in ethanol for over a minute then pulling it out and recording the change in temperature for 5 minutes, the change was decrease.

2007-03-12 13:56:34 · 1 answers · asked by Matt K 2

also the entalpy of combustions of acetylene gas is -1301.1kJ/mol of C2H2
write a balanced thermochemical equation for the complete combustion of C2H2

2007-03-12 13:54:46 · 2 answers · asked by Ballerina 5

2007-03-12 13:52:56 · 2 answers · asked by Anonymous

An individual sprays chloroform onto the surface of their skin and reports that their skin feels colder. One could surmise that the reaction ___.

is exothermic
is endothermic
does not release or absorb heat.
Not enough information given to answer the question.

2007-03-12 13:50:20 · 3 answers · asked by jenn ayr 2

2007-03-12 13:48:40 · 1 answers · asked by Preeya 5

Could you please helping me in identifying what types of reactions are those? (precipitation, oxidation-reduction, acid-base). Thank you!
1) 2KI + Pb(NO3)2 ----> 2KNO3 + PbI2
2) Na2CO3 + NiCl2 ----> 2NaCl + NiCO3
3) CuO + 2HNO3 ----> Cu(NO3)2 + H2O
4) BaCl2 + Na2SO4 ----> BaSO4 + 2NaCl

Thank you!

2007-03-12 13:48:03 · 1 answers · asked by miledi111 1

2007-03-12 13:42:41 · 2 answers · asked by Justin V 1

Hey i'm a little confused with this question..can someone help me out? Thanks in advance!

Consider a weak base-strong acid titration in which 25.0mL of 0.100 M ammonia is titrated with 0.100 M HCl.

a) What is the pH of the solution before the addition of HCl? (pka of ammonia = 4.75)

b) Calculate the pH after the addition of 3.00 mL of HCl

2007-03-12 13:41:29 · 1 answers · asked by Anonymous

2007-03-12 13:38:22 · 3 answers · asked by Anonymous