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3 views

Does clove oil/eugenol interact with nylon type plastics?

So I am aware that the eugenol in clove oil readily melts #6 type plastic (polystyrene). Polypropylene has a higher resistance, while HDPE type plastics seem to have the highest resistance. My main ...
0
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0answers
7 views

Are the reaction rates of these equations equal?

$\ce{CH3CH2CH2Br + OH- \bond{->} CH3CH2CH2OH + Br-}$ $\ce{Rate of reaction = k[CH3CH2CH2Br][OH-]}$ If I change the Br with any element from halides (without changing concentration, volume, mass ...
0
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0answers
7 views

Recommendations for textbooks with correct and up-to-date information

I recently began studying chemistry, only to find out that, apparently, concepts such as “octet expansion” and Lewis structures are outdated and incorrect. And I don’t mean they’re approximations of ...
0
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0answers
4 views

Epoxide and H3O+ reaction?

How does H3O+ form Aldehyde from epoxide? I thought it would become diol..Am I wrong?
-1
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1answer
7 views

A question about (H4CO4) presence

Does (H4CO4) exist as a relatively stable compound (like H4SiO4)?
1
vote
1answer
18 views

Why is molality per mass solvent rather than per mass of solution?

Knowing the moles of substance per mass of solution would be useful. Pour some solution and you'd know how much substance you have. Why is molality defined not this way, but as moles of substance per ...
1
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0answers
10 views

Energy Levels of Molecular Orbitals formed by combination of Atomic Orbitals

In general when we talk about chemical bonding, we say that it is "nature's way to stabilize the systems" and the energy of the molecule formed by atoms will be lower than that of the individual atoms;...
2
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0answers
13 views

Structure of dihydrogen peroxy-phosphate ion

In structure of Dihydrogen peroxy-phosphate ion $\ce{H2PO5-}$, shouldn't -ve charge be on oxygen linked directly to phosphorus, rather than on oxygen linked through peroxy linkage with another oxygen. ...
-1
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0answers
6 views

Pls answer equilibrium question

When temperature is increased then according to La Chatelier's principle the reaction will move in the direction where energy is absorbed this I can understand but there is also another fact that ...
0
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0answers
10 views

What does environmental factor include?

Does E-factor include all of the reagents including catalysts, solvents, and reactants that go into making the product? Further, in the E-factor calculation should all the solvents used in work-up (...
2
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0answers
22 views

Why is NOₓ conversion low at fuel rich conditions in a three-way catalytic converter?

$$ \begin{align} &\text{Oxidation:} &\quad \ce{2 CO + O2 &-> 2 CO2}\\ & & \ce{``HC" + O2 &-> CO2 + H2O}\\ & & & \\ &\text{Reduction:} &\quad \ce{2 CO +...
2
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0answers
20 views

Oxidation of ascorbic acid (Vitamin C)

What would you suggest me to use for oxidation of vitamin C to dehydroascorbic acid instead of bromine water?
5
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0answers
20 views

QM9 property based clustering

I have used a machine learning algorithm on QM9 dataset to extract some features. To visualize this feature space, I used a PCA algorithm to project it to a 2D space (in simple words, every point in ...
1
vote
0answers
15 views

Difference between liquid and solid stearic acid

I had some stearic acid in solid pellet format. It is slippy and in white color. I used this to make some experiments. I recently notice that some manufacturer can supply liquid stearic acid. I ...
-1
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0answers
10 views

Basicity of methyl and ethyl amines in NON-AQUEOUS medium [closed]

Is the order of the basicity of methyl-substituted amines and ethyl-substituted amines change the 'same' in an 'AQUEOUS' and a 'NON-AQUEOUS' medium?
1
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0answers
15 views

Effective Bohr Radius in Transition Metal Complexes?

I am playing around with a toy model of a transition metal complex where the HOMO are $d$-electron states of predominantly transition metal character. Let's say this is a $d^1$ (or $d^9$) system and ...
2
votes
1answer
34 views

Flame test for copper salts

I have read from sources here, here and even in my textbook that Copper (specifically $\ce{CuCl2}$ ) burns with a bluish green flame. All the sources mention that this is due to electron excitation ...
-3
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0answers
24 views

are there any chemicals that aren’t absorbed into the skin? [closed]

For example it could slide, fall off, or change form. It’s for a entrepreneurship project I’m working on. Thanks in advance!
8
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2answers
250 views

What is a word for “atom or molecule”?

What is a word for "atom or molecule"? As in: "The entry of an atom or molecule across a cell membrane into a cell is dependent on its size and solubility." This keeps coming up, and it's really ...
-1
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0answers
7 views

Preparation of diazonium salt is at low temperature, then the rate of reaction is slow or fast [duplicate]

Preparation of diazonium salt is at 0-5'c What is about the kinetical data? If there yield is low? Why we use these diazotisation reaction?
-1
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0answers
6 views

D-Altrose prefer furanose form than pyranose form [closed]

Why D-Altrose prefer to remain in the furanose form rather than in the pyranose form?
0
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1answer
66 views

Preferred Lewis structure for sulphate anion and XeO4

In a section reviewing Lewis structure, the textbook Atkins' Physical Chemistry, 10th Edition, by Atkins, Paula, and Keeler, gives the following illustration of hypervalence and octet expansion: I ...
4
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0answers
41 views

Have IH₃ and IH₅ already been synthesized?

I've seen a paper by Sikalov [1] that says that $\ce{IH3}$ and $\ce{IH5}$ should be observable. Have anyone actually tried to synthesize such molecules? References Sikalov, A. A. Hypervalent Halogen ...
-1
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0answers
11 views

Draw Resonance structures of: [closed]

Draw Resonance structures of buta-1,3-diene. Write their stability order with proper reasons.
-1
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1answer
27 views

Difference between neutral and amphoteric oxides

What is actual difference between neutral oxides (e.g. $\ce{NO},$ $\ce{N2O},$ $\ce{CO})$ and amphoteric oxides (e.g. $\ce{Al2O3})?$ I got a hint of it from the comment of Ivan Neretin.
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0answers
20 views

How do I separate glucose from a mixture of citric acid, tartaric acid and water? [closed]

How would I separate the glucose from that solution, mentioned above?
-2
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0answers
11 views

Amount of matter required to be converted into given amount of energy during a nuclear reaction [closed]

If we provide the sufficient energy for melting 360 tons of iron with converting hydrogen to helium in nuclear reaction, how much matter should be converted to energy? (Imagine that that for every 1 ...
3
votes
2answers
133 views

Use of Concentration for pH

When we find the pH of a solution, do we use normality or molarity? My teacher said that if the compound is present by itself, we can use normality but in all other cases we should use molarity. Can ...
1
vote
0answers
23 views

How to arrive at the preferred IUPAC name for 1,2-diphenylethane?

I am reading a textbook that mentions the molecule 1,2-diphenylethane, $\ce{C14H14}$. A Google search leads to PubChem, where it is mentioned that the IUPAC name for the molecule is 2-...
1
vote
1answer
52 views

What is the Lewis structure of the azide ion?

On a chemistry homework, we're asked to draw the Lewis structure of $\ce{N3-}$. My answer: Nitrogen ordinarily has five electrons in its valence; $\ce{N-}$ has six. This makes a total of 16 ...
-1
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0answers
15 views

What is one possible way to write the electron configuration of an excited Potassium atom? [closed]

I wrote: [Ar] 4p1 and am not sure if that is correct. My teacher says one possible state is [Ar] 5s1, but I wanted to know if my answer was also correct. Thank you!
4
votes
3answers
89 views

Fitting multiple pKa's

I have three histidine residues that are next to each other in a protein. When I compute the fraction of unprotonated states for each individual histidine as a function of $\mathrm{pH}$ my titration ...
5
votes
0answers
19 views

Is there a rule of thumb to predict when coupled cluster might dip below the variational limit?

Coupled cluster is a non-variational method, meaning that it can give energies that are below the true FCI energy (the "variational limit" for variational methods). Often coupled cluster still gives ...
-3
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0answers
29 views

Why Iron III Oxide needs 2 Aluminum to react? How to determine that coefficient if we aren't given the products? [closed]

How to determine the coefficient of Al in the reactants side which is 2, in thermite reaction, if we aren't given the products but just the name of the reactants?. How do you get that number? Why does ...
0
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0answers
21 views

Why are only two bond structures considered for ozone and not three? [duplicate]

We were taught in chemistry that: Formal charges can be determined by drawing the Lewis dot structure, then subtracting the nonbonding electrons and half of the bonding electrons from the number of ...
-1
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0answers
12 views

resonance of captodative radical

I found this resonance in March's book but I do not understand the third canonical structure. Can somoneone show me using arrows how we get the structure? Also found this other version which I do ...
-1
votes
1answer
21 views

CO and H2 gas converting to methane question [closed]

Why is it when you heat and pressurize CO and H2 it converts to methane? Is it because when you heat the molecules the bonds get weaker and the pressure breaks the bonds and allows them to flow and ...
-1
votes
0answers
7 views

Find solid and liquid at room temperature by their boiling and melting point [closed]

Find a gas at room temperature Find A solid at room temperature Find volatile liquid (easily changed into vapours) Substance A. -111. -78 B. -7. 58 C. 0. ...
2
votes
1answer
328 views

What is considered room temperature in Celsius?

Recently, I have seen room temperature listed at 20 °C and 25 °C. Which one is more accurate for use in chemistry problems?
0
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0answers
43 views

Does aniline react with FeBr₃?

I have read that aniline does not undergo Friedel–Crafts reaction because it complexes with Lewis acid $\ce{AlCl3}.$ Will it also react with $\ce{FeBr3}$ during bromination (to receive a 3-bromo ...
-1
votes
0answers
15 views

Metallic Bond Strenght [closed]

So I know that the strenght of the metallic bond increases as the size of the ions decreases, and that has to do with relativistic effects, right? But it's a little confusing as it increases the more ...
2
votes
3answers
112 views

I have a solution of citric acid, tartaric acid, water and glucose. How do I find the concentration of the citric acid present in the solution?

If I try to find the concentration of citric acid through back titration or reverse titration, the base I would use, like NaOH, would react with both acids to form sodium citrate and sodium tartrate, ...
0
votes
1answer
53 views

Is there any non-toxic and non-solvable-in-air liquid?

I want to heat the air with non-aqueous, non-toxic and non-solvable-in-air liquid (with very low relative pressure in air). Is there any such liquid exists? It would be great if the boiling point of ...
-2
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0answers
27 views

Identity of an element A, which form an oxide A2O when reacts with oxygen [closed]

An element $\ce{A}$ reacts with oxygen to give an oxide $\ce{A2O}$. The oxide $\ce{A2O}$ is electrically conducting. The valency of $\ce{A}$ is clearly 1, and it reacts with halogens and ...
-1
votes
1answer
31 views

Mechanism of the reaction of cyclohexanol and concentrated nitric acid to form adipic acid [closed]

If someone could please give me the hint to how the initial attack is carried out, it'd be a huge help.
-2
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0answers
7 views

Bond clevage when positive charge is developed on cyclopropane [closed]

Hi so I was confused on how does the bond cleave takes place if a positive charge is developed on like substituted cyclopropane. Since it becomes highly unstable there I get that the ring will open ...
0
votes
0answers
26 views

Vapor pressure and Ideal Gas Law [closed]

Given the ideal gas law and it's plot of Volume vs Pressure, how does a substance's vapor pressure affect this plot? Does it cause the graph to plateau somewhere? If so why does this happen?
-1
votes
0answers
10 views

Equation for Electrolyte concentration [closed]

What is the equation between conductance and concentration of electrolytes in a liquid? I know how to get the conductivity and thus electrolyte level. But was wondering if there is an equation to find ...
-2
votes
0answers
28 views

Does these benzene compounds can actually exist? [closed]

I found these lamps in the local beer bar. In the middle of the ceiling was located almost real installation of DNA chain so I thought these compounds are possible exist. Unfortunately my chemistry ...
1
vote
0answers
23 views

What could be causing a small uptick in FCS curve at approximately 10 microseconds

I work as an RA in an academic lab. I've been working with FCS fitting for an experiment, and took FCS curves for fluorescein and calmodulin, displayed with residuals below: ]2 I fitted both to an ...

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