Chemistry - January 2007

What about cytoplasm?

2007-01-20 03:56:19 · 7 answers · asked by ♥ 6

2007-01-20 03:36:58 · 27 answers · asked by torirowe 2

2007-01-20 03:31:25 · 8 answers · asked by Anonymous

2007-01-20 03:26:26 · 8 answers · asked by ♫ Music is Love ♥ 6

I believe that the equilibrium will not be affected, but I want to make sure.

Thanks

2007-01-20 03:24:11 · 3 answers · asked by wlfrcomp 1

1/0.00032
(4.23 x 10^-5)/432

2007-01-20 02:58:03 · 3 answers · asked by Anonymous

plz help so confusing

an atom have [what] charge?

2007-01-20 02:27:16 · 10 answers · asked by Dina 2

Mainly the nomenclature of Isomers of alkanes,Alkenes and Alkynes

2007-01-20 02:01:43 · 9 answers · asked by Anonymous

my customers ask what is the difference and if it means that the higher the viscosity does it mean that the oil is thicker

2007-01-20 01:45:15 · 3 answers · asked by Anonymous

Why do we need to use very hot water in washing the black precipitate? When the recovered copper was washed with methanol and acetone, what was/were taken out from the solids?

2007-01-20 01:33:38 · 1 answers · asked by -three31one- 1

To discharge the charged insulator slowly, leave it in moist conditions.The water vapour in the air causes the excess charges on the insulator to leak away slowly.

2007-01-20 00:52:45 · 2 answers · asked by Anonymous

2007-01-20 00:46:10 · 7 answers · asked by smartchic 1

2007-01-20 00:15:37 · 4 answers · asked by curlash 1

Or and example of Precipitation or An endothermic reaction or a physical change

2007-01-19 23:12:51 · 6 answers · asked by Yousaf Mahmood 1

Give the equation for Kp for the reaction:

N2(g) + 3H2(g) F 2NH3(g)

ii) In an equilibrium mixture the partial pressure of N2 was 0.305 atm while that of hydrogen was 0.324 atm. If Kp = 61.1 calculate the equilibrium pressure of NH3 and the total pressure of the mixture.
iii) Will the equilibrium composition shift towards reactants or products, or remain the same, if the total pressure is doubled?

4) When 0.515 g of liquid methanol, (CH3OH, molar mass = 32) was burned in oxygen in a bomb calorimeter the temperature of the calorimeter increased from 25 to 26.06 oC. When 2780 J of electrical energy was used to heat the calorimeter at 25 oC the temperature rose by 0.5 oC.
i) Give a balanced equation for combustion of one mole of methanol in oxygen.
ii) Calculate ∆U for this reaction.
iii) Calculate ∆Ho for this reaction at 25 oC.

[R= 8.314 J K-1 mol-1; 0 oC = 273 K]

2007-01-19 22:53:10 · 2 answers · asked by amanda p 1

A→ B

has a rate constant of 2.5 s-1.

i)What is the rate at time=0 if the initial concentration of A ii) Calculate the concentration of A remaining after 1 s from an initial concentration of 0.7 mol dm-3.
iii)Calculate the activation energy for the reaction if the Arrhenius pre-exponential factor is 1x 1011 s-1 at 35 oC

2007-01-19 22:52:10 · 2 answers · asked by amanda p 1

The cell

Cr(s)│ Cr3+(aq)║ Cu2+(aq)│Cu(s)

has Eo = +1.08V.

If Eo for the half cell Cu2+/Cu = +0.34 V calculate Eo for the Cr3+/Cr half cell.

Give a balanced equation for the cell reaction. How many electrons are transferred in the equation you have provided?

2007-01-19 22:51:07 · 2 answers · asked by amanda p 1

Is buckminsterfullerene a simple molecular substance or a giant covalent substance?

what is the reason?

i rly need help!!! thx

2007-01-19 22:11:46 · 5 answers · asked by Bemi 1

H H
\ /
C
/ \
CH=CH
the middle C is attached separately to the 2 CHs and the 2Hs

2007-01-19 21:29:01 · 2 answers · asked by Mave Rick 1

Using your knowledge of oxidation processes, charge and solubility of transition metals.

2007-01-19 21:09:23 · 1 answers · asked by vicky_icelemon 1

2007-01-19 19:53:15 · 2 answers · asked by jue 1

1) Milk sugar is changed to lactic acid when milk ferments or sours.
C12H22O11 + H2O ------> C3H6O3

2007-01-19 19:50:17 · 4 answers · asked by Anonymous

2007-01-19 19:06:20 · 5 answers · asked by matthewvdm 1

My feet stink. I can smell the odor rising like hot steam from my feet. What is the name of the molecule/compound that makes for this funky odor? IUPAC/Systematic/Common names welcome. Thanks

2007-01-19 19:01:28 · 4 answers · asked by Phillip R 4

2007-01-19 18:39:51 · 5 answers · asked by Gideon 1

This is the equation:

C2H6O (l) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (g)

I appreciate any help!

2007-01-19 18:06:40 · 4 answers · asked by Random G 3

avg = average
temp = temperature

2007-01-19 17:29:04 · 4 answers · asked by paulinatran10 1

2007-01-19 17:22:18 · 5 answers · asked by eliza_andrea15 1

2007-01-19 17:19:57 · 4 answers · asked by Anonymous

Hello ppl..m a student of STD XII n gotto make a chemistry project for my assignment but i couldn't hit on some good topic...so wil u al plz suggest me a good and interesting topic for the project like drugs,antacids or sumthin' good...please......

2007-01-19 16:52:59 · 3 answers · asked by sweet_teen553 1