Unanswered Questions
8,724 questions with no upvoted or accepted answers
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If cigarette smoke is exhaled, what happens to the accompanying exhaled breath?
I want to know what happens to that breath. To help you answer this question, consider in your mind these subquestions:
Is there a necessary principle at work, by which you know that it vanishes/...
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660
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When pH > pKa and when pH < pKa and the effectiveness of buffer solutions
I understand that when $\mathrm{pH}= \mathrm{p}K_\mathrm{a}$, the buffer solution will be at its maximum capacity, and there will be equal concentrations of the acid/conjugate acid and the base/...
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Is this statement correct or not regarding SN1 reaction?
A primary alkyl halide may also undergo SN1 reaction in aqueous formic acid.
This statement is written in one of my organic textbooks. Is it true ?
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Does berylium gain or lose electrons?
Does beryllium want to gain or lose electrons? I know it has 4 protons, 2 valence electrons, and it will gain or lose 2 electrons, but what is it?
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Using Beers Law and the volume/concentration/moles triangle, but unsure of how to proceed?
pH= 8
Absorbance = 0.997
Concentration mol/l = 6.01E-05
In this experiment I used Beer's law to convert absorbance to concentration with a known extinction coefficient (16.6*10^3) - so 0.997/16600 = ...
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Final Temperature of Water
The problem statement, all variables and given/known data:
A certain mass m of water in a copper pot is heated over a stove that releases Q joules of heat to heat the water. Later the same mass m of ...
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Can sulphur from low-flying planes be cause of silver tarnishing rapidly?
My silver dishes, tea set, etc. that previously needed polishing once or twice a year are now turning black in just a few weeks. This area has low-flying planes. Could they be releasing sulphur which ...
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How do I determine which is the reduction reaction in a hydrogen peroxide and potassium permanganate solution?
How was it determined that $\ce{MnO4-}$ was reduction, and $\ce{H2O2}$ was oxidation?
Also, why wasn’t the equation $$\ce{MnO4- + 2H2O + 3e- -> MnO2 +4OH-}$$ used? Or the $$\ce{H2O2 + 2H+ +2e- -&...
CommunityBot
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Why does the water become positively charged?
I'm a little confused studying reaction mechanics and I saw this, where does the water electrons go when the bond is formed
I mean, the carbocation needs two more electrons to get its octect filled ...
CommunityBot
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How to remove hydrate from Fe(NO3)3 . 9H2O?
I am currently in a dilemma where I need to have pure Iron (III) nitrate, but I have Iron (III) nitrate 9 hydrate in order to do a lab experiment where I investigate voltaic cell. I am pretty sure the ...
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Why are only elemental halogens used in oxidation of thiols?
I know that purpose of molecular halogen like $\ce{Br2, Cl2}$ is to take away extra electrons on sulfur so that sulfur bridge can form. But can you use any other molecule beside halogen to do the same ...
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Effect of Clemmensen reduction on carboxylic acids
Does the Clemmensen reduction have any effect on the carboxyl group $\ce{-COOH}$ if it is attached to some organic compound? If yes, what does it get reduced to?
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Identical particles: Why is triplet oxygen more stable than singlet oxygen?
Quoting from Eisberg Resnick Quantum Physics:
If we consider space variables of two electrons (identical particles) to have almost the same values, then their wavefunctions are 'almost' identical ...
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Which is the strongest bond?
Between ionic, covalent and metallic, which is the strongest?
I got really confused looking up on the internet, and found a lot of contradictory informations.
If I have to evaluate the strongest ...
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What would happen if I mixed positive and negative photoresists?
When exposed to light sources with certain wavelength: for positive photoresist materials, the exposed parts will be washed off by developer and the rest of the unexposed parts will remain on the ...
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