Chemistry - March 2007

Or is there some alternate way to synthesize 2,4-dibromo Toluene?

2007-03-01 23:55:54 · 1 answers · asked by Ambrish K 1

2007-03-01 23:34:06 · 1 answers · asked by JW 2

2007-03-01 23:08:26 · 11 answers · asked by Anonymous

So I want to give the aerobic harvesting of energy from glucose in cellular resp as an example of a redox reaction. I have to show the increase/decrease in oxidation number to demonstrate the oxidation/reduction reactions, however, the number of e- doesn't cancel, i.e isn't equivalent...

C6H12O6 + 6O2 --> 6CO2 + 6H2O + (energy – ATP + heat)
Oxidation half-reaction
C6H12O6 --> CO2
a + b + c = 0 a + b = 0
a + (+12) + (-12) = 0 a + (-4) = 0
a = 0 a = +4
ON of C = 0 ON of C = +4
increase of 4

Reduction half-reaction
O2 --> H2O
ON of O = 0 ON of O = -2
decrease of two

Shouldn't the number of 'freed' electrons be equivalent???
thanks!

2007-03-01 23:05:14 · 1 answers · asked by Anonymous

2007-03-01 22:58:14 · 6 answers · asked by crazyoverscott 2

2007-03-01 22:57:47 · 6 answers · asked by preenster_7 1

Please help me...pls explain these statements in details for me.....

"A chemical reaction occurs when reactant particles collide with one another.In the presence can collide with the catalyst and also with each other.This causes the reactant to react in different ways.Thus the activation energy of the reaction can be increased or decreased depending on the type of catalyst used."

2007-03-01 22:52:27 · 2 answers · asked by emikato_913 2

2007-03-01 22:44:54 · 5 answers · asked by PUBIC L 1

About him and his atomic structure.

2007-03-01 22:41:06 · 1 answers · asked by Ada 2

2007-03-01 22:40:24 · 4 answers · asked by hotrod in 7-11 1

7.4 % 53.9396 amu
1.8 % 55.8749 amu
0.7 % 56.9054 amu
90.1 % 58.0133 amu

2007-03-01 22:01:47 · 2 answers · asked by satish r 1

AGBr 8.8X106-7 mol L^-1?
and PbCrO4,1.3x10^-7 mol L^-1

2007-03-01 21:45:56 · 2 answers · asked by tikki 2

Can anyone please help? I need to know which of these functional groups are unsaturated and which are saturated: Alkenes, Aldehydes, Ketones, Primary Alcohol, Secondary alcohol, and Carboxcylic acid. Also what test could I do to prove this?

2007-03-01 21:36:06 · 2 answers · asked by Anonymous

2007-03-01 21:35:01 · 1 answers · asked by Anonymous

metaphorically............

2007-03-01 21:21:51 · 6 answers · asked by Anonymous

the lattice energies of rubudium fluoride RbF and caseium chloride,CsCl are -760kj/mol and -650kj/mol respectively.what is lattice energy of caesium fluoride CsF likely to be
option are
a:-620kj/mol
b:-720kj/mol
c:-800kj/mol
d:-900kj/mol
its answer is b,plz explain me how we will do this
thanks

2007-03-01 21:00:38 · 1 answers · asked by ghulamalimurtaza 3

2007-03-01 20:57:22 · 6 answers · asked by unibloke1 1

It is manufactured from rectifing spirit what is the correct defnation for absoulute alcohol.

2007-03-01 20:42:19 · 10 answers · asked by rosewhitelotus 1

A colorless solution of KBr is added to a colorless solution containing Cl_2.

What's the balanced net ionic eq (no spectator ions) for this, assuming the rxn occurs? And what's the oxidizing agent? thanks again.

2007-03-01 20:14:50 · 4 answers · asked by thesekeys 3

A colorless solution of NaCl is added to an orange solution containing Br_2 (assume aq solutions).

What's the balanced net ionic equation for this? (no spectator ions)... assuming the reaction occurs. and what's the oxidizing agent? and how do you know it's the oxidizing agent? so confused by this concept...

Thanks so much for the help!!

2007-03-01 20:12:21 · 3 answers · asked by thesekeys 3

kcn... the chemical..

2007-03-01 20:08:47 · 1 answers · asked by chorvaning 1

A yellow dye, FD&C yellow 3, is used in some candy coatings. A 0.000015 M solution of this dye has an absorbance of 0.209 at its (LANDA, max)
Calculate the number of grams of this dye in the coating of one piece of candy (M W of dye = 271 g/mole)

2007-03-01 19:42:59 · 1 answers · asked by ediii69 1

If WE TAKE AQUOUS SOLUTIONS .

2007-03-01 19:37:19 · 5 answers · asked by Shakti r 1

2007-03-01 19:15:20 · 6 answers · asked by The monkey did it! 1

2007-03-01 19:03:57 · 2 answers · asked by azy t 2

Does anyone have any info on spontaneous combination? It seems kind of interesting to me. I read that most victims are female. interesting ??

2007-03-01 18:46:55 · 2 answers · asked by shelly92555 4

2007-03-01 18:28:18 · 4 answers · asked by prannayj 2

Many thanks for any help you can give me, this question is numbing my brain! lol

1. (a) (i) Draw a dot & cross diagram to show the bonding in hydrogen sulphide, H2S. State and explain the shape of H2S using the 'electron pair repulsion theory', estimating the bond angle.

(ii) Hydrogen sulphide (H2S) is a gas at room temperature whereas water (H2O) is a liquid boiling at 100oC. Suggest an explanation for this.

(b) (i) Draw a dot & cross diagram to show the bonding in methanal, HCHO. State and explain the shape of HCHO using the 'electron pair repulsion theory', estimating the (H-C-H) bond angle.

(ii) Methanal (HCHO) is a gas at room temperature whereas methanol (CH3OH) is a liquid. Suggest an explanation for this.

2007-03-01 18:21:01 · 2 answers · asked by DC 1

T=298K
Standard Energy= -198.0 kj/mol
pressure of NO=1.64*10^-5
Pressure of O3=1.34*10^-5
Pressure of NO2=2.90*10^-6
Pressure of O2=2.25*10^-2

2007-03-01 18:19:38 · 1 answers · asked by Abdul B 1

2007-03-01 17:45:07 · 2 answers · asked by gabby p 1