All Questions

The question reads; Express each of the following quantities, using significant figures to imply the stated error. (a) 3.6965 p/m 0.02 (b) 25600 p/m 10 (c) 56200 p/m 100

I had this question about an experiment where the group 2 chloride was dissolved in distilled water and excess $\ce{AgNO3}$ was added to the solution to form $\ce{AgCl}$ precipitate. One of the sub-...

$\ce{V^2+}$ ion is more stable than $\ce{V^3+}$ because of the half-filled $\mathrm{t_{2g}}$ level. So, shouldn't the reduction potential be high?

$\ce{Be^2+}$ has an ionic radius of $\pu{45 pm}$, while $\ce{He}$ has a radius of only $\pu{31 pm}$. If they have the same number of electrons (two, in the $\mathrm{1p}$ orbital), and $\ce{Be}$ has ...

Can we say that at absolute zero temperature a gas like $\ce{CO2}$ will be separated into the constituent atoms and after that all of them will solidify devoid of any potential or kinetic energy as ...

For Co(iii) ions when a weak ligand approaches (F), there is formation of sp³d² hybrid orbitals where only 2 d orbitals are going hybridisation, why can't all the 5 d orbitals participate in ...

I thought it would be fun to get an idea of how enormously large $W$ in $S = k\ln W$ is. I'd specifically like to estimate this for a mole of water at $\pu{1 atm}$ and $\pu{298 K}$. To do this, I ...

I have struggled in attaining a solid grasp of the lewis acid/base concept largely because so many sources seem to offer conflicting definitions. For instance, Klein's "Organic Chemistry" mentions ...

If we heat BDC with water then phenol is formed. I was wondering what would happen if we heated dry benzenediazonium chloride. I know that on heating benzenediazonium fluoroborate we obtain ...

Need help all structure are similar so i am confused

What type of reactions can CH3-CH2-O-CH=O, CH3CH2NH+ OH, and each radical product from CH3CH2NH + OH undergo? I am lost on how to answer this question, I guess any help on it would be great!

I'm reading about cDNA synthesis in my textbook and it mentions that: The captured mRNAs are subsequently released and collected, for example, by decreasing the ionic strength of the buffer so that ...

I was thinking of the "particle on a ring" problem as a subdivision of a bigger problem, i.e. the hydrogen atom. While in the hydrogen atom problem, the Hamiltonian contains a potential energy term, ...

Can we use acid chloride in place of alkyl chloride in Gabriel Phthalamide Reaction? Maybe it can be used as process to synthesize amides.

I am trying to parameterize a novel molecule which has atoms not included gaff or parm force field. I finished parameterizing vdw-bond and angle force field. Also I did PES Scan for dihedrals and I ...

I am trying to find the color of an organic molecule, crystal violet, theoretically. I suspect that the color is due to the large conjugated system. My question is, how would I go about finding the ...

The purpose of my question is to know if it is possible to measure with a standard deviation of less than $\pu{1e-4}$ the average mass of the neutrons present in any isotope of a heavy element. For ...

I am confused in resonating structure. My doubt is that in aromatic rings we can't make lone pair act as $\pi$ bond but in $\ce{(CO3)^{2-}}$ lone pair act in resonance as $\pi$ bond

Why is that molar mass has of a substance, which is the mass of one mole of a substance ($6.02\times 10^{23}$ particles of that substance) has the same value as molecular mass, which is the mass of ...

What kind of prospects are there in computational chemistry? How can it transform lives? As it's an "abstract" branch of real-world chemistry, then understanding how it ties to real-world chemistry ...

In this question, I thought the answer would be 3rd due to methyl shift but as per the solution, it is 2nd. Is it a case of Ethyl shift?

Two mole of an ideal gas is subjected to isothermal expansion from $\pu{2 atm}$ to $\pu{1 atm}$ at $\pu{300 K}$. Calculate entropy change of the system, surrounding and total, if the process is ...

Introduction: I am currently conducting a series of experiments in which I am studying the transport of polystyrene nanoparticles (PNPs) through sand and soil. This is done in sand/soil columns, into ...

Title. I have a relatively sound mathematical foundation (linear algebra, differential equations, multi variable calculus etc.), so I’d like to ask what the “best” way to study Quantum Chemistry would ...

Calculate the adiabatic flame temperature of combustion of a blast furnace gas analyzing $25\%$ $\ce{CO}$, $10\%$ $\ce{CO2}$, and rest nitrogen. Use theoretical amount of preheated air at $\pu{1000 °C}...

I am doing a project on the synthesis of detergent by using waste cooking oil. I need help in the chemical equation for the synthesis process. Cooking oil + Sodium hydroxide + Sulphuric acid + Formic ...

I am having trouble with the following problem: Dinitrogen pentoxide, $\ce{N2O5}$, is a solid with a high vapor pressure. Its vapor pressure at $\pu{7.5 °C}$ is $\pu{100 mmHg}$, and the solid ...

I just wanted to ask how much money 1 gram of Hyaluronic Acid is/could be. I am currently doing a research paper.

I am doing a High school lab experiment and I was wondering how would I go about looking at the acidity of milk. I think that it would involve titration of some kind but I am not sure how to do it.

Does the concentration of each ingredient in the facial cream affects the effectiveness of the facial cream? why and how?

Please let me know what would be the answer with explaination

How do ligands like acac and ox interact with metal d orbitals? I know both are pi donor ligands (weak field), so do they interact with the T2g set of orbitals?

How is an an acyl hydrazide converted into an acyl azide in the presence of $\ce{HNO2}$? According to me, the $\ce{-NH2}$ group of hydrazide will get converted into $\ce{-N2+}$ through $\ce{HNO2}$. ...

I have the following redox equation that I need to balance: $$\ce{MnO4-(aq) + SO3^2-(aq) → MnO2(s) + SO4^2-(aq)}$$ The problem says that it happens on basic medium, but I don't see the $\ce{OH-}$ ...

A mineral of a process contains $90\%$ $\ce{FeS2}$ and $10\%$ inerts by weight. This material is calcined with $25\%$ excess air according to the reaction: $$\ce{FeS2 + O2 → Fe2O3 + SO2}$$ ...

I need to make 400ml 5% w/w solution of sulphuric acid. How much acid do I need to dilute with water to get a 5% w/w solution totaling 400ml?

A solution containing: a.) 10 kg of methyl alcohol or 10 kg of ethyl alcohol b.) 10 m solution of methyl alcohol or 10 m solution of ethyl alcohol

ether and the way they overlap with the orbital on the two c atoms

I'm very new to chemistry and I'm experimenting with electrochemistry as I already have a background in engineering. I'm designing a power supply specific to that purpose. I've synthesized acid from ...

Why do aromatic compounds have an upfield shift upon coordination to metals e.g. ferrocene? The 1H NMR shows a single environment at ~4.1 ppm. This is in contrast to the usual aromatic shift of ...

I am using $n = cV$, to find the amount of substance. Concentration of the standard solution is $\pu{1 mol/dm3}$ (no uncertainties given). However, uncertainty in the measurement of volume is $\pu{± 0....

Its known that para-chlorobenzoic acid is more acidic than para-fluorobenzoic acid. But can anyone provide me the whole acidity order of para-halobenzoic acids with pKa values ? Here is what my book ...

I've studied pka of H2O as 15 and anything with a pka lower than it should be a acid . Guanidine has a pka of 13.8 and is being called as strong base . Why is it so. https://en.m.wikipedia.org/wiki/...

If iron ore containing 100t iron(III)oxide,how many tons of pig iron containing 6% impurities can be extracted from reduction of the iron ore by carbon monoxide?

I'm trying to understand the fate of bromide anions during and after they undergo anodic oxidation. I have a solution of 94% DMF/6% water (by volume) with 0.1 M tetrabutylammonium bromide (TBAB) as ...

Based on my readings, valence bond theory (VBT) and molecular orbital theory (MOT) tend to complement one another in explaining a molecule, but I don’t understand how VBT helps us explain the ...

I was just looking at a particular synthesis method on the Organic Chemistry Portal when I saw a particularly puzzling step, involving a 1,3-dicarbonyl compound. The step which I am puzzled by is ...

Hello Chemistry community. It's struck me a bit thinking about mixing butane and oxygen up in one canister, both being liquid and letting them vaporize and burn as a mix. That will definitely make for ...

Can I get brief explanation of the reactions that occur under Glycolysis? What do the curved lines represent?

Krapcho's decarboxylation is a reaction involving esters with a electron-withdrawing group $\beta$ to the carbonyl group and halide ions. It is typically conducted with $\ce {LiCl}$ and $\ce {DMSO}$ ...