All Questions

A sample of $\ce{NOBr}$ gas was placed in a rigid flask where it decomposes at $\pu{25 ^\circ C}$ according to the following reaction: $$\ce{2NOBr(g) <=> 2NO(g) + Br2(g)}$$ At equilibrium, the ...

In an examination, I came across a question, 'which of the following is chiral as well as dissymmetric'. There were four options, and among them, two were achiral, and had improper axis of symmetry. ...

Burning hydrogen releases more total energy than combusting carbon, and all alkanes are denser as well, so why are flame temperatures for alkene molecules higher than their equivalent alkanes? P.S.: ...

Molar mass of oxygen is 16g/mol , but O2 is 32g/mol , it is shows that 32 gram per 1 mol ,but if we add 1 mol oxygen and one mol of oxygen , shouldn't it be 32 gram per 2 mol for dioxygen ? it doesn't ...

My book contains the following graph. My book says - "Deviation from ideal behaviour also becomes apparent when pressure vs volume plot is drawn. The pressure us volume plot of experimental data (...

I have a photocatalytic H2 producing reaction where methanol and water is reacted with sunlight and catalyst to give H2. when I develop rate equation I take water concentration as 1. Is it correct and ...

My problem consists of a structure (say a cylinder) made from a homogenous distribution of a drug from a polymeric matrix. These compounds are mixed homogeneously in different concentrations (10% drug ...

From here https://www.sumnerhealthcentre.com/site/drug-free/soap Soap is very good at what it does - removing oily residue from the skin. It is very difficult to remove motor oil or any greasy ...

Referring to this webpage, Condensation polymerisation of glycine A simple counting argument would tell us that: 2 glycine molecules react, releasing 1 water molecule 3 glycine molecules react, ...

how come Oxygen on the 2nd structure won't have +1 charge because if you use formal charge formula it 6-5 = +1

When talking about polymer blends there is a difference between its structure and morphology, but I am not sure what it is. These two terms are used interchangeably in materials I use to study, but I ...

vibrational analysis of the sample for this project work, iam analyzing the vibrational modes of this sample using raman spectrometer. so i need to know how to prepare this sample

The correct radial probability distribution curve for the hydrogen atomic orbital with principal quantum number,$ n = 3$ and azimuthal quantum number, $l = 1$ is: ($4πr^2ψ^2 $= radial probability ...

Na2CO3(a.q) + 2HCL(a.q) --> 2NaCl(a.q) + CO2(a.g) + H2O(l) If this reaction is carried out by mixing 2.12g of ...

Hydroboration-Oxidation adds a hydroxyl group to alkynes to forn enol. The enol tautomerises to form aldehyde or ketone. In case of non-terminal alkynes, two ketones are formed. Here is the example ...

As far as I know, an increase in temperature speeds up the cell chemical reaction, which speeds up the electrolyte evaporation, which increases the release of hydrogen gas, and hydrogen is the ...

I am trying to estimate kinetic parameters for my liquid decomposition using thermal analysis. After doing a literature survey, I have decided to use the following - thermogravimetry (TGA) ...

The change in entropy for a reversible process is given as- $\Delta$S = $\frac{q_{rev}}{T}$ Where qrev is the heat supplied isothermally and reversibly. The change in entropy for a irreversible ...

What is the reason for the statement - "When the expansion of an ideal gas is carried out under isothermal and reversible conditions, the internal energy does not change, i.e., $\Delta$U=0?" ...

Continuation of Why do nitrogen-containing organic compounds give N2 as the combustion product? (comment converted into question) Nascent state is an obsolete theory in chemistry and is discredited. ...

According to my understanding, the filled orbital (lone pair electron for this) is more nucleophilic (higher energy) if: it has more $\mathrm p$ character (since p orbital is the furthest from the ...

The following information is mentioned in my textbook: In the laboratory, a manganese(II) ion salt is oxidized by peroxodisulphate to permanganate. $\ce{2Mn^2+ + 5S_2O_8^2- + 8H2O -> 2MnO4- + ...

As far as I could think, the phenoxide ion is comparatively larger as compared to acetate ion, so it should undergo less solvation in presence of a protic solvent and thus its nucleophilicty should be ...

There are many claims on the web, explaining that the bleach action of Chlorine gas in discoloring of flower proceeds as follow and require moisture for it : $$\ce{ Cl2 + H2O <=> HOCl + HCl <=...

I was reading about the Steric Number Formula here. There, I came to know that the Steric Number $N=\frac{V+M \pm I}{2}$ where $V = n(\ce{e-})$, the number of valence electrons of central atom, which ...

I know that increasing subshell decreases ionization energy; for example, going from Beryllium to Boron. I do not understand why this is. The answer my textbook (Chemistry 2e on OpenStax) gives is ...

Looking to test the ppm for lead in a powder that is a food item. No experience in chemistry. Possibly may need to test for other heavy metals.

I am attempting to form a synthetic route to a tetrasubstituted benzene compound. In the scheme, there is a step that requires the formation of a carbon–carbon bond in the C-6 position of a methoxy ...

How do we draw the Lewis structures of complex molecules and ions such as ClOF3, OSF4-, F2SeO2, etcetera? I know that for simpler molecules, we can determine the central atom using lowest ...

While studying thermodynamics I encountered a statement stating that " The Enthalpy change in an isothermal process is zero".I started analysing and got stuck when I came to the condition ...

How do molecules actually change the direction of a photon of light? It requires more of a particle physics answer but the question is highly relevant for chemistry.

I have been trying to extract the transition density cube of a simple molecule, $H_2O$. I did a regular geometry optimization and then TD-DFT calculation with a keyword Density=Transition=1, which is ...

According to formula work done is (Resisting pressure X dV)? Then in case of compression, isn't the resisting force is internal Pressure? Then why we the formula for compression is same as expansion ...

i need light of wavelength ranging between 95nm to 100nm to perform an experiment on selective ionization of gas mixture and for this technique to be used at large scale i want to know about how to ...

I learned that $E^\circ_\ce{Cl^-|Ag,AgCl}, E^\circ_\ce{Ag^+|Ag}$ and $K_\mathrm{sp}$ of $\ce{AgCl}$ are related as $$\boxed{E^\circ_\ce{Cl^-|Ag,AgCl} = E^\circ_\ce{Ag^+|Ag} + \frac{RT}{F}\ln K_\mathrm{...

How does the product change with varying $\ce{AlCl3}$ concentration? Answer: In excess, meta bromination is observed and if not, then alpha hydrogen is substituted by ketone halogenation mechanism I ...

With regard to carbohydrates, it is known that in a Fischer projection, if the $-OH$ group is on the right side of the lowest priority asymmetrical (chiral) carbon, then we name it as D and if it is ...

Background I am trying to determine how many kg of $\ce{CO2}$ are released when burning 1 GJ of natural gas. What I've tried I have very little chemistry knowledge, but google led me to these two ...

I would like to ask the experts of this chemistry community their opinions on which balance is more accurate and effective to use in a high school chemistry lab- a triple beam balance or a digital ...

Reading papers about organic synthesis, I see many cases like setting one material as 1.2 eq. I presume that reagents used more than 1 equiv are relatively inexpensive or less reactive than other ...

I finally get Isopropanol at 99.8% for cleaning purposes of electronics and plastics and my idea is to have various bottles, some with only Isopropanol and other mixed with distilled water What can i ...

Hydronium oxygen has a pair of non-bonding electrons in its valence orbital. Chemically it would be possible to bind one more proton ($\ce{H+}$) to the hydronium and thus form the $\ce{H4O_x}$ cation....

I don't quite understand the concepts of Heat of Formation and Bond Enthalpies, and why their respective formulas work, it would be really great if someone could please help explain the difference/...

Hydronium H₃O+ Hydrogen*3 3 Protons 3 Eletrons Oxygen 8 Protons 8 Eletrons -1 = 7 7+3= 10 Eletrons 8+3= 11 Protons Is correct ?

why BF3OEt2 use is additive with TIPSOTf or TBSOTf in aldol type acetal addition reaction

I think the question title is pretty self-explanatory but I was wondering if the covalent bonds in water promote hydrogen bonding between water and other molecules and whether they promote polar ...

Plain old NaCl salt can slightly lower the vapour pressure of water for a given temperature. Other salts such as CaCl₂ lower the vapour pressure to a larger degree. Do any salts, or compounds of any ...

What chemicals when mixed or added to water can create ice, or reduce surrounding temperature greatly?

Find which of $\ce{Na2O2}$ and $\ce{CsO2}$ is paramagnetic. (Adapted from JEE advanced paper-1 2016, q.22) The given solution involves removing the cations and taking the anionic part, i.e. $\ce{O2^2-...

I was looking at this video about fourth generation of nuclear reactors and one of developing concepts is molten salt reactor (MSR) where melted ionic salt replaces water as coolant and also acts as a ...