# All Questions

29,903 questions
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### Deodorants and it's electrical conductivity [closed]

Do deodorants conduct electricity? If so how much it conducts when compared to Salt water?
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### 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 $(K_\mathrm{sp} = \pu{1.6e-44})$ ...
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### 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 ...
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### 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.
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### 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 ...
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### 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, ...
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 ...
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### 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 ...
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### 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 ...
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 ...
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 ...
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### 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 $(100)$ ...
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### 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 ...
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### 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, ...
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### 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?
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### 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 $\pu{20.1^\circ C}$, ...
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### 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. ...
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### 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.
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### 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 ...
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 ...
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?
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### 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 ...
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### 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: ...
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### 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 ...
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.
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### Can someone help me? I have already tried a dimensional analysis but I’m not sure if it’s correct [closed]

This is how the problem is worded.
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### 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-...
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 \$\...
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!
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### 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 ...
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### 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 ...
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 (...
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 ...