# All Questions

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### Can acetic or hydrochloric or nitric acid have any effect on Glycine in an aqueous solution?

If I saturate water with Glycine at 100C and add pure Acetic Acid (in quantities equal to 5% of the volume of the solution) and leave it under reflux for a night, will the glycine be affected in any ...
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### What results after pyrolysis for solid biomass?

If a solid biomass undergoes pyrolysis at 800 degrees Celsius for about 40 minutes, what would be the output of it? I was thinking of Solid: Coke, Liquid: Tar and Heavy Hydrocarbon (gases).
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### Is 1% m/m the same as 1% w/w?

Hydrocortisone cream seems to be sold as 1% w/w, but my cream is 1% m/m, which is confusing. Are they the same units or the same concentrations?
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### Potential energy expectation value and virial theorem

I have been trying to solve this problem Part a) can be proved using the formula . For part b), the expectation value of the potential energy can be calculated from the integral , where Therefore, ...
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### Salting out worsens extraction efficiency

I'm currently writing a thesis about using dispersive liquid-liquid microextraction DLLME for extracting nitramines from aqueous solutions. We've been using octan-1-ol as the extractant and HPLC for ...
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### Protein-Protein binding affinity

I am a complete novice at Protein-Protein interactions but needed a bit of clarity. I have a model that produces binding affinity between a drug and a viral target in terms of Kd values. I want to ...
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### Why is platinum used at room during prepation of alkanes from alkenes [closed]

During prepation of alkanes From alkanes,alkenes are hydrogenated using catalyst platinum at room temperature.
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### Write the structure of the major organic product of the reaction of 1-bromo-2-methylpropane with NaOCH2CH3 in CH3CH2OH

The solution to this question was an E2 product. However I assumed the reaction would be SN2 since 1-bromo-2-methylpropane had a primary substrate. Why is the product E2? Process of thinking: (OF why ...
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### I have a homework doubt related to chemical equilibrium [closed]

One mole of N2O (g) at 300K is kept in a closed container at 1 atm. It is heated to 600K when 20% by mass of N2O4 is decomposed to NO2(g). What is the resultant pressure. A) 1.2 atm B) 2 atm c) 2.4 ...
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### Could shear force from blending denature alpha amylase / glucoamylase enzymes?

I am trying to break down the starches in a certain variety of oats in the most efficient way possible. I have to break the whole oats down after cooking, so they are finer particles for the amylases ...
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### How are natural orbitals derived from the electron density matrix?

I have a $4\times4$ electron density matrix in 6-31G for $\ce{H2}$ using psi4 and I am wondering how to get the natural orbitals of the system. I have diagonalised the density matrix $\mathbf{M}$ into ...
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### Physical significance of Chemical potential and Fugacity

I'm studying equilibria and thermodynamics and came across these two terms. My problem is, unlike other thermodynamic properties that I can understand physically like Volume, Pressure, Enthalpy etc. ...
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### Why is the structure of atrazine so small compared to it's chemical formula? [closed]

The chemical formula of Atrazine is C8H14ClN5, however, I can't seem to find a structure for it that has the right amount of each element. Most structures look like this
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### What is the oxidation state of Ru in H2Ru6(CO)18? [closed]

(asked in Indian civil services chemistry optional exam, 2009) I want to ascertain whether oxidation state of Ru is positive(H present as hydride ligand) or negative(H present as positive counter ion)....
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### How are the toxic components in a mixture identified?

I was doing research on buckwheat sprouts (as to whether I should include them in my diet) and I came across a website that said eating too much can cause fagopyrism, which is caused by compounds ...
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### Is incineration of a solid fuel complete or incomplete?

If I have some solid material like biomass and incinerate it at 1000 Celsius degrees for 15 minutes in an oxidized atmosphere within an incineration oven. As an output it gives me ash. Is the ...
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### What is d-orbital contraction?

I know that this is a very common question but it's important to address because I thought d orbital contraction only had an effect on the effective nuclear charge ($Z_{eff}$) but recently I came to ...
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### Observed and experimentally calculated standard electrode potential of Cobalt and Manganese

In my book (NCERT India) the below diagram and a corresponding explanation is given. The line tells that the observed standard electrode potential of manganese is more negative than the calculated one ...
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### What start the reaction in a voltaic cell?

In a zinc-copper voltaic cell, What causes the initial electron movement from the zinc to the copper? I understand that copper would pull the electrons more strongly than zinc, but only if it is ...
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### What is the temperature of air achieved with natural gas heaters? [closed]

I am designing a conveyor oven. Aluminum molds are being heated with gas heaters. I want to know what will be air temperature?
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### Which is correct for a gas? [closed]

Which is correct for a gas ? a) mean free path is less than collision diameter b) mean free path is greater than collision diameter c) mean free path is equal to collision diameter