All Questions
0
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0answers
6 views
When SO2 changes state, what forces/bonds are being overcome/broken?
When silicon dioxide changes state, are the covalent bonds being broken (ie. the intramolecular forces) or is it the intermolecular forces?
0
votes
0answers
7 views
What is the acid-base behaviour of polar covalent compounds? [on hold]
I cant seem to find any information on this off the internet. Does it differ depending on the compound?
1
vote
1answer
10 views
What is the difference between a desiccant and a deliquescent?
I understand that both a desiccating solid and a deliquescent solid are "hygroscopic" in the sense that they bind to water.
But what is the difference? And what are the applications of a desiccant vs ...
1
vote
0answers
13 views
Conductivity of a semiconductor at high temperatures
I understand that increasing the temperature of a semiconductor excites electrons in the valence band into the conduction band. Hence, the resistivity of a semiconductor decreases with temperature.
...
-1
votes
0answers
12 views
What does this number indicate in the name of this organic molecule?
When naming organic molecules, what does the 3 in front of the hexene indicate?
(E)-3-methyl-3-hexene
0
votes
1answer
13 views
Why don't covalent compounds dissociate in water?
I understand that ionic compounds dissociate when dissolved in water. Why don't covalent compounds do the same?
0
votes
0answers
25 views
Temperature change when diluting salt water?
If one part fresh water is added to two parts sea water (both at the same temperature), will the temperature of the mixture be different?
1
vote
0answers
12 views
Spectrochemical Series - Latest version?
--Studying the Crystal Field Theory [under Coordination Chem.] at school now--
A book my teacher lent me [printed in 2002] has the spectrochemical series in it, and it depicts pyridine [py] as having ...
2
votes
0answers
17 views
Mechanism for the decomposition of HI
I've been trying to find the mechanism for the gas phase decomposition of hydrogen iodide:
$$\ce{ 2 HI (g) <=> H2 (g) + I2 (g)} $$
Anyone know of sources where I can get information on this? I ...
0
votes
1answer
40 views
Why is chloroform kept in dark coloured bottles?
Why is chloroform ($\ce{CHCl3}$) kept in dark coloured bottles?
-4
votes
0answers
12 views
What is volume in lit of oxygen is required at STP is completely convert 1.5 moles of sulphur to sulphur dioxide? [on hold]
Your options are
11.2 ,22.4 ,33.6 ,44.8
10
votes
1answer
1k views
Has anyone even taken a picture of a molecule to confirm the geometry predicted by theory?
Curious non-chemist here.
Have the geometries of molecules been proven, or are we operating strictly on mathematical theory?
To put it over-simplistically: has anyone ever taken a picture of a ...
1
vote
0answers
22 views
Ferric chloride, copper and the reactivity series [on hold]
Copper is lower than iron in the reactivity series,But in the reaction between ferric chloride and copper, copper oxidizes.Explain why?
The reaction is:
$$\ce{FeCl3 + Cu -> FeCl2 + CuCl}$$
The ...
2
votes
0answers
37 views
LCAO in Molecular Orbital Theory
In molecular orbital theory, please explain why cyanide ion combines with metal from the carbon end and not from the nitrogen end?
2
votes
0answers
14 views
“Diabatic” vs “Diathermic”
In Atkins' "Elements of Physical Chemistry (Sixth Edition)" it is written that, "walls that permit heating as a mode of transfer of energy are called diathermic", and that the converse situation is ...
