All Questions

We are designing a lab that is based on photochemical reactions, but we have not learned about photochemical reactions in class, so I just wanted to get a better understanding of photochemical ...

There is a statement in a very popular textbook of spectroscopy by Pavia (Chapter 3, Intro. to Spectroscopy), it says "The observed FID is actually an interference signal between the radiofrequency ...

Would acetanilide be more soluble in water at 25 degrees Celsius because it has an N-H and an oxygen that can participate in hydrogen bonding whereas diethyl ether only has an oxygen?

I need a free software to perform a conformational search on molecules with 10 to 16 rotational bonds. What software would you recommend me? Where can I download it? Where can I find a manual of this ...

Which of the following ion will form most water soluble hydroxide? (A) K+ (B) Ni2+ (B) Zn2+ (C) Al3+

As per what i learnt about ethers hydrolysis, the oxygen protonates itself first and then the water and then water being a weak nucleophile, we first prefer the ether to cleave from either side to ...

For the extremely important water gas shift reaction shown below, the $K_c = 3.491$ at a certain temperature. What are the equilibrium concentrations of all the components of the reaction if $\pu{0....

I understand that $K$ will be dimensionless. Let's say an equilibrium involving $K_p$ and the reaction is $\ce{A -> B}$, $K_p$ will be dimensionless. If the reaction $\ce{A + B -> C}$, then ...

Most websites and books mention a closed system, but technically isn't an isolated system required? If energy can be transferred, then the position of of the equilibrium will continuously change and ...

What type of energy is stored between link of two atoms? 1] Thermal energy 2] Nuclear energy 3] Chemical energy 4] Potential energy

I have understood the two terms as: When we say that a substituted benzene ring is reactive we mean the same thing as calling the reaction of potassium and water highly reactive. When we call a ...

I stumbled upon a compound [Ni(Nh3)6] ^2+ which has Nh3 as a strong field ligand. Which implies that pairing will occur and only one last d-orbital will be left with no electrons. But I couldn't ...

For my paper, I need to find the reaction between $\ce{(CH3)2Se2}$ and $\ce{H2O2}$ and between $\ce{SeC(NH2)2}$ and $\ce{H2O2}$. The mechanism below shows how I think it goes. The reaction should ...

I am confused as how to do the ques , should i take the ring as a single stereocentre or should i consider the no. Of single bonds about which the groups are showing GI in the ring.(https://i.stack....

Find the increasing order of ortho product formation when Y is (i) F, (ii) Cl, (iii) Br, (iv) I. We know that halides are ortho, para directing for EAS reactions and we consider the electronic ...

Electrolysis: If anions continue to deposit electrons on the anode, does this mean after a while the anode becomes negative? If not how is the anode discharged from it’s electrons

Draw resonating strictures of the following compound: In this molecule there are two π-components, but they are not conjugated. According to me, as there is no conjugation, it should not have a ...

Transition metals have a number of properties where they differ from other metals in the periodic table. Discuss these differences in terms of high densities, high melting and boiling points, ...

A bit of a jewellery question but chemistry related. I want to encase a synthetic ruby (corundum, Al2O3) in silver by melting the silver around it. Either in a furnace or by casting. The MP of silver ...

What is the mechanism of reaction of a ketone with $\ce{NaNO2/HCl}$? Can $\ce{NaNO2/HCl}$ be considered as freshly prepared $\ce{HONO}$ here? I am confused about how the reaction will proceed.

I am having a issue with terminology with regards to packing fraction: $$\frac{\text{Number of atoms} \times \text{Volume of atom}}{\text{Volume of unit cell}}$$ But I was recently reading a solid ...

In the recent rotational spectroscopy literature, "microwave polarization pulse" is often used in conjuction with pulsed Fourier transform microwave spectroscopy (Google Scholar). Sometimes the pulse ...

Find the product of the reaction of dimethyl ketone i.e. $\ce{CH3C(O)CH3}$ with $\ce{NaNH2}.$ Should I do nucleophilic addition and form the product in the picture??

Just having trouble understanding how to approach an ICE table question with no Kc and a volume change Given If you had 4.4 mol of a solid, A, placed in a 1L container which decomposed in to B and ...

I am trying to sputter $\ce{Nb}$ on $\ce{SiO2}$ Z-Cut wafers (quartz crystal). I was wondering if $\ce{Nb}$ will stick well to the surface of the wafer. I've routinely deposited $\ce{Nb}$ on $\ce{...

What methods are used to detect a particular molecule? I know of raman spectroscopy and "test" reactions (forming coordination complexes, iodine starch test, silver mirror test etc.)

The conundrum I have a security printing ink that I make by adding an IR-absorbing dye to a 50/50 mix of Isopropyl Alcohol and distilled water. The ink solution is pale green but dries virtually ...

A general answer to the question is great, but specified to my problem is very much welcomed. My team had a lab project — to synthesize chrome alum crystals. We first dissolved $0.3 \, \rm g$ of ...

Weird question, but... would a spectroscopic analysis of a plaster of Paris sample reveal a chemical identifier that could be used to compare that sample against another. I want to be able to say ...

A reaction happens where $\ce{A}$ is converted into $\ce{B}$. It takes $\pu{4 min}$ for the concentration of reactant $\ce{A}$ to decrease from $\pu{3.0 M}$ to $\pu{1.0 M}$. What is the average rate ...

Given the decay $Λ_b(5620) → K^− + P_c(4380)+ → K^− + J/ψ + p$ I was asked as a homework question , to consider all hadrons containing b quarks, to determine whether $Λ_b(5620)$ is stable with ...

If the emission of a photon from an excited state to the ground state occurs with a precise energy, then why is it that wavelengths that differ from lambda max have values on a fluorescence vs. ...

A gas described by van der Waals equation has the pressure that is lower than the pressure exerted by the same gas behaving ideally. True or false? My approach $$P(\text{ideal}) = P(\text{real}) + P(...

So I decided to have some fun using the concept of Delta G to see if i can calculate melting points and boiling points for compounds. I was looking at the following reaction: NaOH(S) --> NaOH(l) I ...

Is it possible to oxidise the alcohol in question with just concentrated H2SO4 (without the need for a Chromic substance) and if so what does this mechanism look like?

The equivalent weight of HNO3 in the following reaction is ‘x’, then the value of x/21 is 3Cu+8HNO3⟶3Cu(NO3)2+2NO+4H2O in this I atempted by using redox formulas but my answer is comming 1 but ...

To form an electrophile for this reaction to occur, the acyl halide interacts with the catalyst. However, on reviewing the conditions for the reaction, I have encountered that the 2 equivalence of the ...

How should I compare the order of rate of 1.formaldehyde 2.ethanal 3.p-nitrobenzaldehyde 4.p-methoxybenzaldehyde For nucleophilic addition the rate depends on the intensity of electron deficiency of ...

According to this source hydrophobic behaviour occurs when a molecule does not have a charge or is neutral and therefore cannot be attracted to the negative nor positive parts of water. Casein has an ...

A spherical ball of iron is put into a hot bath of oil. The iron ball is initially at a low temperature and heat transfer from the oil to the iron will increase the temperature of the iron ball. ...

I did an experiment trying to calculate how much energy was used to evaporate water with different ammounts of NaCl. In the experiment, I put 71g of NaCl then filled the beaker with water to the ...

I asked this question somewhere and I got the answer as the the very fundamental arrangement molecules changes which leads to different optical properties of the substances. I can't express the ...

Do natural or synthetic fabrics (clothing, etc) dissolve/trap dioxins and dioxin-like compounds from third-party/external sources such as airborne plastic fumes or soot? Also, is it safe to assume ...

In an AQA 2017 Chemistry paper, a $0.0131 \pu{mol}\cdot\pu{dm^-3}$ saturated solution of calcium hydroxide is prepared and then the question asks to predict the pH of a similar solution of magnesium ...

Using the molarity of sodium hydroxide (0.50M) and the volume of sodium hydroxide used to find the equivalence point (13.5mL), determine the moles of sodium hydroxide used.

I am aware that excessive/long-term exposure to dioxins dioxin-like compounds can cause skin problems (chloroacne) and their great affinity to lipids/fats, but I was wondering if the same occurs at ...

please see the question below(i don't know how to approach question my teacher just told me to use the formula 2^n where n are number of chiral carbons but it doesn't work always please can some one ...

The solubilities of iodine in $\ce{CCl4,n-Hex,Et2O,PhCH3}$ were given respectively as 19 g/kg, 13 g/kg, 337 g/kg, and 182 g/kg. These results puzzle me for the following reasons: 1) Iodine, being a ...

For an assignment I am investigating the reaction $$\ce{MCO3 + 2HCl -> H2O + CO2 + MCl2}$$ where M is a group 2 metal and zinc. I am investigating changes in the rate of reaction and for that I ...

Calculate $\mathrm{ pH }$ of $\pu{ 0.05 mol }$ of $\ce{Zn(CH3COO)2}$ and $\pu{ 0.025 mol }$ of $\ce{ NaOH }$ dissolved in $\pu{ 1 L }$ of distilled water? I tried to use the systematic method by ...