All Questions

-2
votes
0answers
10 views

Deodorants and it's electrical conductivity [closed]

Do deodorants conduct electricity? If so how much it conducts when compared to Salt water?
2
votes
1answer
38 views

Mixing cobalt(III) hydroxide and thallium(III) hydroxide

A simple question on solutions is driving me crazy. At this point, I think the textbook's wrong. Here's the question: A saturated solution of cobalt(III) hydroxide $(K_\mathrm{sp} = \pu{1.6e-44})$ ...
1
vote
1answer
41 views

What does the number of orbitals in a subshell represent? [on hold]

s subshell has 1 orbital and p subshell has 3 orbitals. Does that mean that there is a high probability that the electron is in the p subshell? As orbital are the space where there is a high ...
-5
votes
0answers
28 views

What is the total volume of the CO2(g) and H2O(g) produced by combustion of 1.00L of C2H6(g) at STP? [closed]

I am very confused on how to solve this problem. I know that the balanced reaction is $\ce{2 C2H6 + 7 O2-> 4 CO2 + 6 H2O }$ The temperature is 273.15 K and pressure is 1 atm but that's it.
-2
votes
3answers
75 views

Why is the structure of HNO3 have a central atom rather than being linear?

Why is the structure of $\ce{HNO3}$ have a central atom rather than being linear? I know formal charges need to be reduced as much as possible, and if there was a structure with two oxygens and a ...
2
votes
0answers
26 views

Why is the titratable acidity of my wine going down as it ages and oxidises?

I am currently studying chemistry in grade 12 studies and I have come across a halt in my investigation. The experiment was to see how the increase in ethanol would lead to a more acidic wine, ...
-1
votes
0answers
25 views

Redox problem involving Na2S and HSO4- [closed]

I'm trying to complete a question on an assignment that says Show all steps in determining the number of electrons an atom of sulfur loses when it changes from sodium sulfide to hydrogen sulfate ...
2
votes
1answer
24 views

What Are Examples of Reducing Sugar in Mailliard Reaction?

I'm interested in food science, and I've been reading about Maillard reaction. All of the articles / videos about Maillard reactions that I found online mention that reducing sugar and amino acids ...
-1
votes
0answers
21 views

Electrophilicity of carbonyl compounds?

I have the following compounds to sort according to reactivity to nucleophilic attacks. The most electrophilic position is clearly the carbonyl position. My proposed order is B>D>A>F>E>C . My ...
6
votes
1answer
101 views

Michaelis–Menten equation for multi-step reactions

I am trying to understand the following equation from the paper by Wang et al. [1, p. 5\ at the SI]: Michaelis–Menten Representation of the Kinesin Cycle We assumed that there is a strong ...
10
votes
1answer
884 views

How long would it take for sucrose to undergo hydrolysis in boiling water?

I was reading the book Cocktail Codex and there was a snippet on avoiding boiling sugar and water to make simple syrup that made me a bit skeptical. Here it is: Heat also affects the molecular ...
-3
votes
2answers
46 views

Significant figures of the product [on hold]

How is $$\frac{8.925 − 8.904}{8.925} × 100 = 0.24?$$ When I solved I got $$\frac{0.021}{8.925} × 100$$ Now it will have to be $2$ significant numbers $(0.021)$ time $1$ significant number $(100)$ ...
1
vote
0answers
24 views

Aldol Reaction on an intermediate

I was given the following reaction to prove a mechanism for: and I managed to prove the first step with ease. The second step, forming the "base-catalysed aldol" is the part that's rather confusing ...
2
votes
1answer
35 views

Epoxidation with peroxyacids

In this particular epoxidation/hydroxylation reaction, why does the epoxide only form at one of the double bonds and not both? The compound initially reacts with the peroxyacid to form an epoxide, ...
1
vote
0answers
23 views

Is there any formula for finding out probable distance of orbitals or do I just remember the values? [closed]

Like, do I need to just remember that it is less in 3d than 3s and so on?
4
votes
1answer
112 views

How to get the efficiency of a heat engine which undergoes an elliptical cycle?

An ideal diatomic gas undergoes an elliptic cyclic process characterized by the following points in a $PV$ diagram: $$(3/2P_1, V1)$$ $$(2P_1, (V1+V2)/2)$$ $$(3/2P_1, V2)$$ $$(P_1, (V1+V2)/2)...
-2
votes
0answers
21 views

Which of the following orbital is not centrosymmetric? [closed]

Among the following orbitals, which are/is not centrosymmetric​? dz^2 dx^2-y^2 s px
-1
votes
0answers
8 views

Quantative analysis [closed]

Propane and oxygen react according to the following equation. C3H8(g) + 5O2>>>3CO2(g) + 4H2O(g) Calculate the volume of carbon dioxide and water vapour produced and the volume of oxygen remaining, ...
0
votes
1answer
39 views

How can I neutralise H2 gas without burning it? [on hold]

I was thinking of maybe making it bubble into a solution containing something that would react with H2 yielding either a dissolved substance or a precipitate from the reaction. Maybe a solution with ...
1
vote
0answers
32 views

Over time what happens to soluble liquids with different densities

I have a case with two liquids: Water and another chemical which is miscible in water. The chemical has a density of 800 g/l so it's 20% less dense than water. Initially the chemical was mixed with ...
-5
votes
0answers
21 views

What do the bonds I circled in sarin mean? [duplicate]

I understand the rest, just not those two and I couldn't find an answer by googling.
-1
votes
1answer
27 views

Things to consider to determine stability of a compound to another? [duplicate]

Some Compounds with higher bond dissociation energy seem to be more reactive towards certain compounds then ones with lower bond dissociation energy , so what are the things you need to factor in to ...
1
vote
1answer
19 views

Dosing leaves with Zinc Nitrate for pollution experiment - Need specific concentration

I am trying to assess the pollution tolerance of an insect using Zn as a proxy. I have a supply of Zinc Nitrate Hexahydrate that I want to use to contaminate dried leaves (the insect's food). The LD50 ...
1
vote
3answers
171 views

Shouldn't it take more energy to break CO2 compared to CO? [closed]

I read in a book that bond dissociation energy of carbon monoxide $(\ce{CO})$ is $\pu{749 kJ/mol}$ and carbon dioxide $(\ce{CO2})$ is $\pu{532 kJ/mol}.$ Shouldn't it take twice as much energy to break ...
0
votes
0answers
33 views

What is stability of a chemical compound measured in? [closed]

Like NaCl is more stable the CsCl, so is there a unit that puts a number on it?
1
vote
0answers
53 views

How did the tablet become like this?

How did the tablet become like this? There was a gap in the packet, so I'm guessing it reacted with moisture but is it so? Edit: Composition of 'Tendocare'- Chondroitin Sulfate and Vitamin C ...
1
vote
1answer
25 views

Can I safely use a separatory funnel to extract the precipitate from a solution?

Can a separatory funnel be used to collect a precipitate, or would that risk clogging the stopcock on it? I'd like to recoup the precipitate for filtering without passing the entire solution through ...
-2
votes
0answers
23 views

How hyperconjugation possible in the below carbocation [closed]

![enter image description here](https://i.sHow hyperconjugation possible in this carbocation
0
votes
3answers
46 views

what is the difference between how taste and smell are detected?

Taste and smell are both chemical processes ... parts of the food dissolved in saliva come into contact with the taste receptors.[1] These are located on top of the taste receptor cells that ...
1
vote
1answer
55 views

Why does mixing two solutions decrease the concentration of the solutes?

The irreversible liquid reaction $$\ce{A + B -> C + D}$$ follows an elementary rate law and is carried out isothermally in a plug flow reactor (PFR). The volume of the PFR is 500 litres....
-2
votes
0answers
20 views

Calculating heat of dissolution from calorimetric data [closed]

The aluminum cup inside your calorimeter weighs $\pu{39.45 g}$. You add $\pu{49.23 g}$ of water and $\pu{3.02 g}$ of $\ce{KCl}$ to the calorimeter. The initial temperature is $\pu{20.1^\circ C}$, ...
1
vote
1answer
25 views

What is responsible for the smell of incomplete hydrocarbon burning and what sensor can detect it?

After I pass the smoke from partially burned fuel oil through a filter, I can still very strongly detect the smell. It is the same thing you smell from the exhaust when an old car or truck goes by. ...
-1
votes
0answers
14 views

Why do certain compounds decompose into constituents on exposure to light in photolytic Decomposition?

Compounds like AgCl, AgBr, H₂O₂... decompose by the process of photolytic decomposition. Kindly explain why these material decompose on exposure to light along with mechanisms and processes.
0
votes
1answer
32 views

Priority of carbons attached to chiral group, one with double bonded oxygen, one with two oxygens [on hold]

I have a chiral carbon. Two of the atoms attached to the carbon are other carbon atoms. One of those carbons has a double bonded oxygen and a methyl group attached. The other has two oxygens and a ...
2
votes
1answer
42 views

What is dielectric constant and how does it explain the reason why water is one of the best solvents

When i was reading solublity of ionic compounds,they mentioned that polar compunds are fairly soluble in polar solvents and water is better solvent due its high dielectric constant.Can anybody explain ...
-1
votes
1answer
41 views

Antimatter molecules properties [closed]

Do the antimatter molecules have the same chemical properties with matter molecules?Should we define electropositivity for antimatter molecules since the chemical bonding would be between positrons?
-2
votes
0answers
22 views

Clarification Needed on the usage of dashed lines for bonds

The diagram below has many bonds that are dashes. I'm having hard time understanding it. From what I see I tend to assume the following: There's an aromatic ring. M is metal which may bind to any ...
-5
votes
0answers
29 views

Pentaquark made clear [closed]

We recently found out what are pentaquarks made https://www.sciencenews.org/article/physicists-figured-out-how-pentaquarks-are-built Can they create stable atoms like the baryon core atoms? Citation: ...
1
vote
1answer
29 views

What molecules are produced in carbon arc lamp and how do they produce light?

I am curious about the chemistry of the arc lamp (an indirectly for the incandescent bulbs) thus I would like to ask the following. It is a common understanding that the electrons pushed inside an ...
2
votes
2answers
31 views

Are any commercial plastics made from biomass/plant matter?

Are any commercial plastics made from plant matter currently. I expect it can be done in a lab but I am wondering about cost competitive tonnage quantities.
0
votes
0answers
40 views

Non-equilibrium gas cap above saturated liquid-gas solution

If I could somehow instantaneously replace the $\ce{CO2}$ gas cap at the top of a soda bottle with a different gas, say $\ce{N2}$, would the bottle pressure increase as a result of the $\ce{CO2}$ de-...
1
vote
0answers
55 views

A tricky question in Eudiometry/Gas analysis

In a eudiometer $\pu{14 ml}$ of $\ce{CH4}$ and $\pu{38.5 ml}$ of $\ce{O2}$ was introduced. After explosion and cooling to initial temperature ($\pu{23°C}$) the volume of eudiometer was found to be $\...
-1
votes
0answers
22 views

Dibromoethane Symbol Equation [closed]

Can Dibromoethane (CH2BrCH2Br) be written as 2(CH2Br)? I'm doing GCSEs so I have no idea about stuff like this. Thanks!
0
votes
0answers
11 views

Preserving a DMSO “tincture” of plant extracted compounds [closed]

I have soaked dried plant material in 99.99% pure DMSO for compounds extraction. I have then filtrated the solution. DMSO is hygroscopic, which means it will induce water over time. Q1- How long ...
0
votes
0answers
29 views

Robinson annulation

In the mechanism of Robinson annulation, what is the rate determining step? I have searched in my book but it is not given. If possible please specify the reason for that step being the RDS. Thanks in ...
1
vote
0answers
23 views

How one can calculate Si-O-Ca/Mg valence angle energy?

I want to perform the relaxed scan (or relaxed surface scan) for the valence angle energy of Si–O–Ca, Si–O–Mg, Al–O–Ca, and Al–O–Mg. I will use DFT (ORCA), probably B3LYP and triple zeta basis set (...
5
votes
2answers
293 views

Tiffeneau–Demjanov rearrangement products

With reference to the paper McCasland, G. E. Pinacolic Rearrangements of Epimeric Aminocyclanols. J. Am. Chem. Soc. 1951, 73 (5), 2293–2295 DOI: 10.1021/ja01149a110. (ResearchGate link). It states ...
0
votes
0answers
17 views

Pool Water Electrolysis for Rust Removal

I had an old tool I was trying to remove rust from using electrolysis. I used a solar panel and chlorinated pool water. I have had a difficult time online finding what the products of the reaction ...
1
vote
1answer
53 views

Calculating Mixing Enthalpy in GROMACS

What is the most reliable way to calculate mixing enthalpy of binary solvent mixture using GROMACS? [EDIT] I have simulated two-component systems of water and organic solvent with GROMACS. In a ...

15 30 50 per page