All Questions

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0answers
9 views

Dehydration of 4-Hydroxyphenylacetone to Phenylacetone possible?

Is a Dehydration of 4-Hydroxyphenylacetone (CAS.770-39-8)to Phenylacetone with H2SO4 possible? Does anybody have some Literature on that, cause i searched and didnt find anything.
-1
votes
0answers
6 views

Temperature dependency on isotope fractionation

I have a question concerning isotopic fractionation. I am trying to explore the effect of temperature on isotopic fractionation. I know that isotopic fractionation is temperature dependent and it ...
-1
votes
0answers
3 views

Solubility and analysis of diclofenac and lidocaine base

Helllo guys; I want to make a gel of diclofenac sodium and lidocaine base and prepare for quantitative analysis by uv spectroscopy.but there is close overlap for both(diclofenac sodium and lidocaine ...
0
votes
0answers
8 views

Software or methods to predict properties of a substance

There's a very similar question here Software for predicting chemical reactions My question is slightly different. Given a formula for a molecule or a substance consisting of several molecules, is it ...
2
votes
1answer
22 views

What is a simple formula to approximate the change in relative humidity as temperature rises/falls?

The moisture-carrying ability of air goes up as the temperature rises. So if I take a volume of air and heat it or cool it (allowing it to expand/contract so the pressure remains constant) how can I ...
-1
votes
0answers
22 views

If water vapour is assumed to be a perfect gas… Calculate the internal energy change when 1 mole of water is converted to ice

If water vapour is assumed to be a perfect gas, molar enthalpy change for vapourisation of 1 mole of water at 1 bar and 100 C is 41 KJ/mole. Calculate the internal energy change when 1 mole of water ...
-2
votes
0answers
22 views

HCl + NaCIO + Al + Fe What Happens? [on hold]

So I am going to combine the following elements and chemicals for an experiment. HCl + NaCIO + Al + Fe (Hydrochloric Acid + Sodium Hypochlorite + Aluminum + Iron) I understand that hydrochloric ...
-1
votes
0answers
24 views

Internal energy question

Calculate the work done when $\pu{176 g}$ of $\ce{Fe}$ reacts with $\ce{HCl}$ to produce $\ce{H2}$ gas (i) in a closed fixed volume, and (ii) in an open beaker at $\pu{25.0^\circ C}$ (isothermal, $\...
-1
votes
1answer
19 views

Why is boron or carbon solids and chlorine a gas at room temperature

I know different compounds have different states at room temperature because of inter-molecular forces ( dipole-dipole force, hydrogen bonding, and London dispersion forces). But how do they act on ...
1
vote
3answers
33 views

Which is more reactive, chlorine radical or chloride ion?

Ions are very reactive for obvious reasons (i.e. Coulomb force); $\ce{Cl-}$ ions will be very quick to form an ionic bond with positive ions (unless inhibited). Chlorine atoms without reduction ($\ce{...
-1
votes
0answers
15 views

Are these the intermediate steps for dihydroxylation of an alkene using OsO4?

or perhaps Also, is NaHSO3 required at any point and if so why?
-1
votes
0answers
4 views

Cathode lenght and configuration

I have cast iron cultipacker wheels that are rusted. I plan on using 1/2 rebar for anodes. 2 questions. 1 Will it make a difference if i use straight bars along edge of container or bend 90° and ...
0
votes
0answers
5 views

Can iodometry analyse the peroxide radicals of palmitic acid after it has been heated?

I know that oleic acid in palm oil forms hydroxide radicals to form aldehydes in their secondary oxidation. Does a palmitic acid go under a similar process?
3
votes
0answers
23 views

The carbon-13 NMR for 1,1,1-trichloroethane

I was working the following spectroscopy problem from Clayden 2e that asks us to identify the structure of a compound from information about its carbon-13 NMR peaks. Problem 3.5: The solvent ...
0
votes
0answers
15 views

Why are dislocations thermodynamically unstable?

Dislocations are thermodynamically unstable in contrary to point defects.In this context I would like an answer for this.
0
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0answers
12 views

Some clarifications about Point Groups rapresentations for molecules

This is what I've understood until now about this subject, please confirm if what I write is true or not. Choosen one molecule, there is a certain number of symmetry operations which this molecule ...
-1
votes
0answers
9 views

Difference between given mass of uranium block used in calculation and mass of protons calculated to be within it

I am explaining $E=mc^2$ in a project and calculating as an example the energy released if all the protons in a $\pu{1kg}$ block of uranium were converted into energy. To do this I have used mass/mol/...
-1
votes
0answers
16 views

How does ionic compounds exchange electrons in crystal lattice?

What I couldn't understand is, for example in NaCl, there is one Na and one Cl is needed. Because Cl needs one electron to complete it's octad. But in crystal structure, there are six Cl bonded one Na,...
0
votes
1answer
18 views

Difference in leaving group ability due to variation in nucleophiles

Wikipedia writes: There can still exist contextual differences in leaving group ability in the purest form, that is when the actual group that leaves is not affected by the reaction conditions (by ...
1
vote
1answer
27 views

In zero order why we don't need the coefficient of reactant in integration of rate law?

For a reaction: $\ce{aA->product}$ The rate law is $\text{Rate}=-\dfrac{\mathrm d[A]}{a\,\mathrm dt} = k$ Where: $k$ is the rate constant $[\ce{A}]$ is the concentration of the reactant $\ce{A}$...
0
votes
1answer
18 views

Role of copper oxide in this ArSN2 reaction [on hold]

Please clear this doubt of mine?
1
vote
0answers
21 views

What is the origin of chirality in the universe?

I am just curious with the fact that our body is made of so many chiral molecules the DNA that we possess is chiral, the amino acids in our body is chiral and there are many other objects other than ...
0
votes
0answers
24 views

Production of alkyl halides

One of the famous reactions of production of alkyl halides is the reaction of hydrogen halide with alcohols. The synthesis of the alkyl halide is different depending upon the halogens. I was taught ...
-1
votes
1answer
22 views

Electron configuration project [on hold]

My teacher wants me to make a “ 3D accurately labeled and modeled s,p,d and f orbitals for electrons” any help pictures maybe? Due Monday!!
-1
votes
0answers
31 views

Proof of the VSEPR shapes

The VSEPR predicts that the atoms arrange themselves in such a way that the electron pair repulsion is minimized. Thus the atoms arrange themselves in space in such a manner so as to be as far apart ...
0
votes
0answers
8 views

What is the mechanism for the formation of azodye when LiAlH4 reacts with nitrobenzene [on hold]

I couldn't find the mechanism. I thought aniline would be the final product.
0
votes
0answers
16 views

How is the force constant and the distance of equilibrium calculated in the CHARMM force field (constants kb and b0 respectively)?

I am trying to create a molecular dynamics simulation by implementing a simple version of the CHARMM potential function: How are the kb and b0 constants derived based on the length of the bond?
-4
votes
0answers
30 views

Anyone know how to solve this problem? [on hold]

Guys this question is from my homework. Any thought on this?
0
votes
1answer
31 views

Oxygen Solubility in Water

This is probably really obvious, but I really don't understand. Why does oxygen dissolve in water when oxygen is a nonpolar molecule and water is a polar molecule? It's obvious that oxygen does ...
-3
votes
0answers
13 views

What tends to gain electrons? Why? [on hold]

What atoms tends to gain electrons? Metals, nonmetals or metalliods? I tried to look this up. I need to know for class- we have a test soon. Gaining electrons is one of the key points.
0
votes
0answers
21 views

Best level of theory for many CO2 molecule behavior [on hold]

What level of theory is best to use for simulating effects of varying levels of light and magnetic force on a set of closely aligned CO2 molecules (preferably 5 or more). Is there a Windows desktop ...
-3
votes
0answers
14 views

Substance dissolved in non-polar solvent, then added to polar solvent? [on hold]

What is the fate of a substance dissolved in a non-polar solvent, say ethanol or acetone, then added in small proportion, say 10% v/v, to a polar solvent such as water? The solubility of the substance ...
-1
votes
1answer
24 views

From where does nucleophile attack the ketone in a nucleophilic addition reaction ? [on hold]

I inserted a picture to help show where my misunderstanding lies. I know that in the nucleophilic addition of ketones and aldehydes , a racemix mixture is produced . And I know that the reason is ...
-1
votes
0answers
14 views

Reaction between hcfc 141b and isopropyl alcohol [duplicate]

Can 50% 1,1-dichloro-1-fluoroethane react with 50% isopropyl alcohol? Condition: room temperature
-1
votes
0answers
31 views

How to find the pH for a very diluted HCl solution? [duplicate]

Yesterday my chemistry professor asked us to try to solve this problem. Find the pH of this reaction: $$\ce{HCl + H2O -> H3O^+ + Cl^-}$$ Knowing that: The volume of the solution is 1 liter. ...
2
votes
1answer
38 views

Could Be2- exist?

I understand that Be2 cannot exist, since it has as many electrons in the antibonding as in the bonding orbitals. But it seems to me that since the next electron would go into the πu orbital, which ...
1
vote
1answer
16 views

Diffuse functions for Ahlrichs/Karlsruhe basis sets in Gaussian?

As the question states, can one use the basis sets of Ahlrichs and coworkers (e.g. def2-SVP, def2-TZVP, ...) with diffuse functions (e.g. def2-TZVPD) in Gaussian? The regular basis sets have been ...
-2
votes
0answers
18 views

Electrolysis of water and using Sulfuric acid as a conductor [on hold]

Okay, when I use Sulfuric acid as a conductor, then, no change occurs in the sulfuric acid. But why? Why doesn't something occur with the sulfate ions? If there's any problem in my question please ...
-2
votes
0answers
13 views

Why is Aromaticity good for molecules stability and Anti-aromaticity isn't? [on hold]

I have read that ring current in aromatic molecules is stabilizing and that in anti-aromatic is destabilising. But I cannot wrap my head around it why.
-2
votes
0answers
16 views

Which has the smallest bond angle? [on hold]

Which of the following has the smallest bond angle? A)(I3)- , B)CS2 , C)(N3)- , D)XeF2 , E)NO2.
0
votes
0answers
23 views

Hydrogen bonding deshielding

In NMR spectra it has been stablished the deshielding effect on those hydrogens participating in a hydrogen bond but my question is: if the $\ce{O}$ of a $\ce{-CH2OH}$ group acts as a donor, does it ...
-2
votes
2answers
22 views

Question on enthalpy change [on hold]

Well, this is a picture from my book, My problem here is that, in exothermic reactions, isn't the enthalpy of reactants greater than the enthalpy of products? Then, why does my book say otherwise? ...
0
votes
2answers
46 views

The real structure of difluoro(dioxo)xenon (XeO2F2)

I have a problem regarding structure of difluoro(dioxo)xenon ($\ce{XeO2F2}$). I have posted a image above. my teacher is saying that the structure B is correct as there is very less repulsion in ...
1
vote
2answers
51 views

Why we don't we save water by boiling the contaminated water to get the pure steam?

I see lot of drinkable water wasted in household and industrial activities, water usually gets contaminated with detergents(and other household materials),chemical effluents released from factories . ...
0
votes
1answer
19 views

Why must a buffer solution contain both a weak acid and a salt solution of its conjugate base?

Doesn’t the weak acid dissociate to produce the conjugate base on its own? I understand that when a strong base is added to the buffer solution, the hydroxide ions will react with the hydrogen ions ...
-1
votes
0answers
8 views

How to determine concentration of components in sample using Gas Chromatography and spiking technique? [on hold]

A pesticide sample of 1,250 g contains the main components A, B, C and the filler material is dissolved in a solvent up to 1L. As many as 5 mL of the sample injected into the GC turned out to give a ...
2
votes
1answer
13 views

Calculate the transition dipole moments between the 1s inner shell and the high-lying states of a molecule

I am trying to calculate the transition dipole moments between the 1s inner shell and the high-lying states of N2, namely, $<\psi_{1s}|{\bf r}|\psi_{high-lying}>$. For this, I installed ...
0
votes
0answers
10 views

Why is a thioester more reactive than an ester? [duplicate]

I'm curious as to why a thioester is more reactive than an ester when it comes to reactivity towards nucleophilic attack. I know that the two factors affecting the reactivity towards nucleophilic ...
2
votes
1answer
23 views

Acidity comparison between cyclopropene and cyclopropane

There many sources on the internet saying that cyclopropane is more acidic than cyclopropene because the conjugate base in latter would have antiaromaticity which would destabilize it. But in this ...
-3
votes
0answers
24 views

IUPAC name of this trisubstituted benzene [duplicate]

Can you guys please help me name this compound? Steps would be appreciated.

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