# All Questions

29,056 questions
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### When does Hartree-Fock fundamentally fail?

The Hartree-Fock approximation (HFA) works by assuming each electron sees the effective electric field from all the other electrons as some self-consistent field. The HFA is known to give pretty ...
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### Does the amount of solute affect rate of solvation?

I know that in order to increase the rate of solvation, you need to increase how often solute and solvent particles come into contact. You can do it by: agitating the mixture increasing the ...
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### Will methane react with methyl chloride?

If no then will it react in any special conditions ? how do you tell if two compounds will react with each other?
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### Why chewing gum gets hardened after drinking water

Basic question, please don't say temperature change, because i've tried, and it never gets back to same elasticity! There must be some other chemistry at work. Even with luke warm water or room ...
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### Rate Law with Catalysts

The hypothetical reaction 2A+B $\rightarrow$ C+D is catalyzed by E as indicated in the possible mechanism below. Which rate law best agrees with this mechanism? $\\$ (A) Rate=k[A][B] $\\$ (B) ...
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### How should we express concentrations and partial pressures in ΔG=-RTlnK? [duplicate]

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 ...
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### What kind of system is required for dynamic equilibrium to be set up?

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 ...
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### Type of energy stored in links between two atoms [on hold]

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