All Questions

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 ...

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

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studying chemistry, only to find out that, apparently, concepts such as “octet expansion” and Lewis structures are outdated and incorrect.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 ...

How does H3O+ form Aldehyde from epoxide? I thought it would become diol..Am I wrong?

Does (H4CO4) exist as a relatively stable compound (like H4SiO4)?

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 ...

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;...

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. ...

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 ...

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 (...

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

What would you suggest me to use for oxidation of vitamin C to dehydroascorbic acid instead of bromine water?

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 ...

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 ...

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?

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 ...

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 ...

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

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 ...

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?

Why D-Altrose prefer to remain in the furanose form rather than in the pyranose form?

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 ...

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 ...

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

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.

How would I separate the glucose from that solution, mentioned above?

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 ...

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 ...

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-...

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 ...

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!

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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. ...

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

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 ...

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 ...

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, ...

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 ...

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 ...

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

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 ...

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?

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 ...

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 ...

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 ...