# All Questions

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### Show that the following processes are irreversible [on hold]

Show that the following processes are irreversible. (a) Gas freely expands from V to V+dV (dV>0) adiabatically, and (b) Gas expands adiabatically from p to p+dp (dp<0) via the Joule-Thompson ...
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### How to dissolve PLA/PCL/PMMA?

I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another ...
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### Which reaction occurs first when 5-hexen-1-ol reacts with sulfuric acid?

I am trying to solve this question: Find the major product of the following reaction: Now we could either do electrophilic addition on the alkene or do dehydration of alcohol. These two ...
21 views

### the differences between glycerol and its commercial version glycerin [on hold]

Does glycerin still have the same magnetic properties as glycerol can someone please tell me it is for a science project that i need to explain just so i can make a visual representation of how it ...
17 views

### The most acidic hydrogen of 4‐hydroxybutanenitrile

Identify the most acidic hydrogen atom in the compound below: $$\ce{NC-CH2-CH2-CH2-OH}$$ My teacher said that the $\ce{H}$ connected to $\ce{O}$ is the most acidic since $\ce{O}$ is more ...
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### combustion analysis [on hold]

2.4g of a compound of H,C,O gave on combustion 3.52g of carbon dioxide and 1.44g of water. the RMM of the compound was found to be 60 what is the masses of C,H,O what is the empirical formula of the ...
34 views

### Molecular orbital energies prediction with ML algorithms

In the recent years, computational chemistry community has focused on Machine Learning algorithms to predict molecular properties. Unfortunately, many of the authors of such papers are not chemists, ...
20 views

### How can carbon black be pellet?

I want to make the carbon black paste and pelleterized it. What solvent can be used to heat up after carbon is formed?
14 views

### The rate of diffusion of two gases A and B are in the ratio 16 is to 3 if the ratio of their masses present in the mixture is 2 is to 3 then [on hold]

The rate of diffusion of two gases A and B are in the ratio 16623 is the ratio of their masses present in the mixture is 2 is to 3 then
26 views

### Propylene Glycol to clean vinyl records

I clean vinyl records with an ultrasonic record cleaning machine. Would propylene glycol be good to use as a surfactant in a 1 - 2 % concentration with distilled water? Would it harm the vinyl record?...
14 views

### Solutions and Dilutions [on hold]

I have a 1g per 80ml stock solution.I would like to create a 0.001g per Liter solution what volume of the stock solution should I add to make up a 1L solution?
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### Energy Conversion in a Activated Complex

My book states that transition state has highest energy out of Reactants and Products . My question is why ? If we follow law of conservation of energy shouldn't the extra energy given + existing ...
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### Sources for files for testing a thermal ellipsoid (ORTEP) program

I am trying to reimplement the functionality of the classical program ORTEP for producing thermal ellipsoid plots of a crystal/molecule in a modern computer language. Unfortunately, I am having ...
440 views

### Reaction of aqueous sodium carbonate with aluminum foil

Aqueous sodium hydroxide is known to react with aluminum foil in an exothermic, hydrogen-gas releasing reaction like $$\ce{2NaOH(aq) + 2Al(s) + 2H2O(\ell) → 2NaAlO2(aq) + 3H2(g)}$$ However, on ...
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### How to name specific compounds? [on hold]

There's something about Chemistry that I need to clear up. Naming compounds. So I heard that there are different ways to name a compound depending on what it is. But I can't keep track of it all! ...
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### THOROUGHLY mixing compounds [on hold]

I am trying to figure out what tools and methods I need to create a thoroughly mixed solution of the following component compounds: + 20 milliliters of liquid sunflower lecithin (very sticky and ...
8 views

### What is the total bond energy for esterification? [on hold]

Ethanoic acid + methanol ➡ methylethanoate +water
23 views

### convert 1277 cm2 to m2 [on hold]

What’s the steps to complete this problem? I get confused when going from atoms to moles to grams. Would this type of question be like the same process for atoms to moles to grams?
25 views

### Simple Q. : Determining alkali from Ideal Gas Law (metal + 2 HCL)

I can't understand how to answer one of my Pre-Lab questions, it's going to be something really obvious but I can't find the fix for my answer from the supporting material... (This isn't cheating on ...
64 views

### Is there something wrong with my code? [on hold]

I was checking my RHF code and found a couple of bugs (which include getting incorrect eigenvalues and eigenvectors amongst other things). I suspect it's either an issue with my Hartree-Fock algorithm,...
45 views

### Is a maleimide reaction inhibited by ethylene glycol?

Due to a recent switch in systems, we have to add 45% ethylene glycol to a maleimide reaction with Sulfo-MBS (m-maleimidobenzoyl-N-hydroxysulfosuccinimide ester) and a reduced oligonucleotide ...
69 views

### Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
25 views

### Methyl Radical. Lewis Acid or Not?

Is methyl radical a lewis acid ? According to me it is a lewis acid as any species can be considered as a lewis acid if it can accept an electron in its LUMO.