Chemistry - December 2006

2006-12-31 23:46:36 · 2 answers · asked by kothais 1

2006-12-31 22:21:04 · 14 answers · asked by Anonymous

to know the metals which constitute an Indian Re1,Rs2,Rs5and 50 paisa coin

2006-12-31 22:10:30 · 8 answers · asked by yash k 1

manufacture,uses,disposal etc.

2006-12-31 19:29:26 · 3 answers · asked by john d 1

Consider the titration of 30.0 mL of 0.030 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added.

(a) 0 mL

(b) 10.0 mL

(c) 20.0 mL

2006-12-31 18:08:38 · 2 answers · asked by Anonymous

2006-12-31 17:03:40 · 2 answers · asked by pinkiezbox 1

Pls. enumerate the common ones.

2006-12-31 16:55:18 · 8 answers · asked by Jacque 1

what is the difference between organic and inorganic molecule?
1.what is protien,carbohydrates,amino acids,hydrocarbons???

pls give me brief account on this....?

2006-12-31 16:50:12 · 4 answers · asked by Anonymous

=]

2006-12-31 16:28:51 · 1 answers · asked by CM 2

open container?

i. placing it in a samler container
ii. increasing the number of moles of liquid in the container
iii. moving the continaer and liquid to a higher altitude

A. i only
B. ii only
C iii onlyu
D. Ii and iii only
E. i, ii, and iii

2006-12-31 15:54:57 · 4 answers · asked by Anonymous

reaction from 1-iodopropane to propylamine..

2006-12-31 15:30:43 · 2 answers · asked by pinkiezbox 1

For example, there was a problem that asks you how much heat was transferred, when 147g of NO2 is dissolved in 100g of water, and the equation was 3NO2 (g) + H2O (l) --> 2HNO2 (aq) +NO(g), and the delta H = -138kJ.

How do you know whether to calculate how much heat was released, by using 147g of NO2, or 100g of H2O?

2006-12-31 15:13:55 · 2 answers · asked by Anonymous

I remember looking at my chemistry textbooks and seeing the orbitals fashioned as something similar to an inflated balloon, but do the electrons travel solely on the surface of the balloon or both on the surface AND into it (as if the surface were the farthest they could reach)?

hope I didn't totally screw up the question I had in mind.

2006-12-31 14:40:32 · 3 answers · asked by humby 2

CH3CH2OH boils at 78 degrees and CH3OCH3boils at -24degrees C, although both compounds have the same composition. The difference in boiling points may be attributed to a difference in
A.Molecular mass
B.Density
C.Specific heat
D.Hydrogen bonding
E.Heat of combustion

2006-12-31 14:38:55 · 7 answers · asked by Anonymous

compounds below in the order of their increasing solutbility in water?

Ch3-Ch2-CH2-Ch2-CH3 =x
Ch3-Ch2-Ch2-Ch2-OH = y
ho-ch2-ch2-ch2-oh=z

a.Z b.Y c.Y d.X e.X

2006-12-31 14:31:11 · 4 answers · asked by Anonymous

CH4(g) + O2 --> CO2(g) + H2O + energy

I was also wondering if the enery that is with the H20 makes any difference in balancing the equation. Thanks.

2006-12-31 14:12:51 · 6 answers · asked by ╦╩╔╩╦ O.J. ╔╩╦╠═ 6

Can someone describe me all the chemical properties and of -CHO ???
I will appreciate your answer

2006-12-31 12:44:26 · 3 answers · asked by giovabao 2

2006-12-31 12:12:49 · 5 answers · asked by godisgreat 1

2006-12-31 12:10:29 · 4 answers · asked by godisgreat 1

2006-12-31 12:08:27 · 3 answers · asked by godisgreat 1

2006-12-31 12:06:12 · 1 answers · asked by godisgreat 1

2006-12-31 12:04:40 · 2 answers · asked by godisgreat 1

How do you know when a molecule a neutral in order to calculate its oxidation number?

2006-12-31 11:44:28 · 3 answers · asked by Luciya 2

A solution contains the ions Ag+, Pb2+, and Ni2+. Dilute solutions of NaCl, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order? A) Na2SO4, NaCl, Na2S B) Na2SO4, Na2S, NaCl C) Na2S, NaCl, Na2SO4 D) NaCl, Na2S, Na2SO4 E) NaCl, Na2SO4, Na2S

Answer and Explain why! Thanks.

2006-12-31 11:10:15 · 2 answers · asked by sunneyzwang@sbcglobal.net 2

2006-12-31 10:58:14 · 18 answers · asked by sharon 1

2006-12-31 10:44:49 · 2 answers · asked by amskeezbaby (; 2

This is the question:
Adrenaline is the hormone that triggers release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49°C. What is the molar mass of adrenaline?
I found the moles of CCl4 [36 g/154 g-mol CCl4]. Then I did .64 g adrenaline/moles of CCl4, but I got the answer wrong.
So now I'm thinking... should I find the chemical compostion and formula weight of adrenaline and then just do .64 g adrenaline/moles adrenaline? Is the CCl4 irrelevant?

2006-12-31 10:42:16 · 3 answers · asked by SDesign 1

Pi bonding occurs in each of the following species except?
CO2
C2H4
CH4
CN-
C6H6

2006-12-31 10:35:31 · 2 answers · asked by supergerm13 2

A sample of 0.1341 g of an unknown monoprotic acid was dissolved in 25.0 mL of water and titrated with 0.0950 M NaOH. The acid required 19.3 mL of base to reach the equivalence point.

(a)What is the molar mass of the acid?

(b) After 12.0 mL of base had been added in the titration, the pH was found to be 5.10. What is the Ka for the unknown acid?

2006-12-31 09:51:17 · 3 answers · asked by Anonymous

What unit of measurement for nuclear particles, was named after a
figure of speech for something being unlikely?

2006-12-31 09:39:50 · 4 answers · asked by Harrison P 1