Chemistry - February 2007

I am having trouble with the Arrhenius Equation. Here is the problem I must solve. Please explain how do to it.

A reaction rate increases by a factor of 800 in the presence of a catalyst at 34°C.
The activation energy of the original, uncatalysed, pathway is 119 kJ mol-1.
What is the activation energy of the catalyzed pathway, all other factors being equal?

Also, K = Ae^Ea/RT what does the e stand for? This is what is confusing me

2007-02-03 13:04:19 · 2 answers · asked by Sgt. Pepper 2

What happens to the reacting substance in chemical reactions?

2007-02-03 13:03:56 · 3 answers · asked by Toothie 2

how do i balence

NO + O2 --> NO2

2007-02-03 13:03:31 · 6 answers · asked by Anonymous

I did it in middle school with two stips of metal in a funky looking beaker with a silcock at the top to collect H above one strip and O2 above the other. The real question is, is there a way to get a seperator to do this with speed on a consistent long term basis? Energy for the process would not be an issue. Has anyone had experience or know anyone who can manufacture one to specifications?

2007-02-03 12:54:58 · 7 answers · asked by Bimpster 4

I assume it should be a simple process, then again, a simple question from a simple mind...

Thanks!

2007-02-03 12:47:40 · 3 answers · asked by Bimpster 4

2007-02-03 12:44:29 · 1 answers · asked by Anonymous

Okay, I've got thirty problems to do for chemistry, and I've done like 20 of them, and I've literally been working on this since 12 in the afternoon. I've been reading and rereading the chapter, but chemistry doesn't really come easy to me. Biology is my specialty lol. So here are a few problems from the page... could you not only tell me the correct answer, but give me a little explanation as to why.... Your help would be MUCH appreciated. You don't have to answer all of them, just answering one would help me greatly lol.

For 1 and 2 the answer is either hybridization, resonance, or vanderwhaals forces.

Question 1: It is used to explain the fact that the four bonds in methane are equivalent...

Question 2: Its used to explane the fact that the carbon-to-carbon bonds in benzene, C6H6, are identical

Question 3: Which of the following does NOT behave as an electrolyte when it is dissolved in water?

A. CH3OH
B. K2CO3
C. NH4Br
D. HI
E. CH3COONa

...

2007-02-03 12:22:48 · 2 answers · asked by gravytrain036 5

What are the disadbantages of..
Animals
Building
Plants

2007-02-03 11:55:19 · 1 answers · asked by Cutie 4

a) if 50 mL of water at 22.3 degrees C is mixed with 50 mL of water at 47.7 degree C in such a way that no heat is lost to the environment, what will be the temperature of the final mixture?

b) if 50 mL of water at 22.3 degrees C is mixed with 50mL of water at 47.7 degree C in a calorimeter with Ccal= 20.0 J/Degree C, what will be the temperature of the final mixture?

Thank you so much!

2007-02-03 11:48:36 · 1 answers · asked by Anonymous

2007-02-03 11:47:04 · 1 answers · asked by Cutie 4

2007-02-03 11:40:07 · 6 answers · asked by Chriss T 2

how do u balance that chemical equation?

2007-02-03 10:53:59 · 6 answers · asked by miguels wifey 1

How do you know stuff like: if the reaction is first order in A and second order in B, and time is measured in minutes, what are the unts for k? This is just for the general equation aA +bB --> cC +dD

2007-02-03 10:47:34 · 1 answers · asked by Kiko 3

2007-02-03 10:21:38 · 1 answers · asked by jowrah33 1

What is the volume at STP of 2.66 moles of Methane (CH4) How do you do this?? please help!

2007-02-03 09:51:28 · 2 answers · asked by Rachel 2

How many moles of bicarbonate ions, aluminum ions, and oxygen atoms are present in 64.0 g aluminum bicarbonate?

2007-02-03 09:32:42 · 2 answers · asked by eastdurhamcop 1

What is the volume at STP of 2.66 moles of Methane (CH4) How do you do this?? please help!

2007-02-03 09:30:58 · 3 answers · asked by Rachel 2

Choices: Rutherford, Thompson, Milikan, or none of these.

1. Any sample of a chemical compound will contain the same elements in the same proportions.

2 An electron has a mass that is very small compared to the size of the atom.

3.Electrons are negatively charge pieces of matter.

4.In a reaction, the mass of the products must equal the mass of the reactants.

5. The charge to mass ratio of an electron

6. Most of an atom is empty space.

7. An atom has a nucleus that is very small

8.Neutrons are a particle with no charge.

2007-02-03 08:50:18 · 3 answers · asked by Domino 1

how do you do this problem?

how many grams of CO(g) are there in 745 ml of the gas at 1.03 atm and 36 degrees celsius ?

thanks for the help!!!

2007-02-03 08:44:59 · 2 answers · asked by Mia16 3

2007-02-03 08:32:33 · 1 answers · asked by redalert 2

2007-02-03 08:30:46 · 1 answers · asked by odtuecon 1

I also believe that there is iron and copper, but I am sure that there are more!

2007-02-03 08:22:03 · 3 answers · asked by poolesvillegc 2

Please help with this problem:

a sample of gas at STP is to be heated at constant pressure until its volume triples. what is the new gas temperature?

2007-02-03 08:21:40 · 4 answers · asked by Mia16 3

2007-02-03 08:15:23 · 3 answers · asked by Kris E 1

So I have 200 mL of Water.

The mass of the calorimeter is 24.375g.

The initial mass of the calorimeter w/ the water is 217.833g (193.458g of water)

The final mass is 217.607 (193.232g of water).

The initial temperature is 23.0°C, the final temp is 43.0°C, the change is 20°C.

The mass of ethanol burnt is 1.418g.

So I need to know the Heat released from this mass of ethanol J/g

And Heat released from 1 mole of ethanol kJ/mol.

So I know I use the equation q= -mass x SHC x (change)Temp.

I'm mostly confused about what I plug in for the "mass" part. SHC is 4.184 J/K*g. And the change in Temp would be the 20.0°C which would have to be changed to Kelvins.

But if anyone could show me how to answer both questions fully, I would appreciate it ^ ^. Thanks.

2007-02-03 08:08:27 · 1 answers · asked by Anonymous

When water enters your stomach, why doesn't your stomach acid react and heat up like when you, instead of diluting acid the correct way, pour the water into the acid?

(Acid into water is the correct way, right?)

2007-02-03 08:04:00 · 4 answers · asked by Crackotage 2

True or False


1.Atoms cannot be created or destroyed in a chemical reaction.

2.Atoms of different elements combine in whole number ratios to make compounds.

3. In chemical reactions, atoms are combined, separated or rearranged.

4. All matter is composed of extremely small particles called atoms.

5. All atoms of a given element are identicle in size mass and other properties.

6. Atoms cannot be subdivided.

2007-02-03 07:50:21 · 1 answers · asked by Domino 1

A+B ----->AB is an example of a

a. synthesis reaction
b. decomposition reaction
c.single displacemetn reaction
d. redox reaction

2007-02-03 07:36:36 · 6 answers · asked by Anonymous

2007-02-03 07:09:16 · 4 answers · asked by danity0414 2

in an exothermic reaction, _______

a. energy is conserved
b. the information of bonds in the product releases more nergy than is required to break he bonds in the reactants
c. energy is released as bonds form
d. all of the above

2007-02-03 07:05:12 · 2 answers · asked by Anonymous