Unanswered Questions
8,738 questions with no upvoted or accepted answers
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How to synthesize lanthanum(III) chloride & Cerium(III) chloride from their oxides?
Interested in obtaining anhydrous lanthanum/cerium chlorides
$\ce{La2O3}$ / $\ce{СeO2}$ in a flow of carbon tetrachloride at 500 degrees
$\ce{La2O3}$ / $\ce{CeO2}$ with ammonium chloride when heated (...
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Metaphosphoric acid - can it exist as monomer?
I read in my textbook that N2O5 can be prepared by reaction of HNO3 and P4O10 . A product HPO3 is also formed.
Then while discussing oxoacids of phosphorus , it said that metaphosphoric acid exists ...
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In electrolysis, does voltage or amperage produce more gas?
I'm trying to produce a large amount of brown's gas, and I'm wondering if higher voltage or amperage will split the water faster.
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In what form does the respective halides of thallium exist as?
Thallium Halides like $\ce{TlF}$ and $\ce{TlI}$ exist. However, my text says that $\ce{TlI}$ exists as $\ce{Tl+}$ and $\ce{I3-}$. This is understandable with the help of the inert pair effect. Then ...
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How can an atom have 2 outer shells?
For example, my textbooks says how many electrons in the outer shell in Nickel? and it says the answer is the electrons in both the d shell and s shell. Doesn't shell equal= n quantum number? And n=4 ...
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Nuclear Fusion and the worlds water supply
First off, I'm probably missing an important part of the argument regarding nuclear fusion.
What I think I know about it;
Nuclear fusion (using heat instead of gravity) is taking Deuterium and ...
CommunityBot
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Dissociation of 4-aminobenzoic acid in aqueous solution
I believe that 4-aminobenzoic acid's structural formula is
$\ce{C7H7NO2}$
Hence, $$\ce{C7H7NO2 + H2O -> ?}$$
what are the dissociation products of the 4-aminobenzoic acid in aqueous solution ?
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faraday laws of electrolysis
I came across this question:
A quantity of electrical charge that brings about the deposition of 4.5 g $\ce{Al}$ from $\ce{Al^{+3}}$ at cathode will also produce the following volume (STP) of $\ce{H2}...
CommunityBot
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Why do the reactions of organic matter tend to be endothermic?
I am studying a level chemistry. I have come across this fact that organic matter generally undergo endothermic reactions.
I can't find an explanation for this anywhere online.
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Does H2, Pd/C reduce a conjugated ketone?
Would H2, Pd/C be a sufficient reagent for this reaction to proceed?
The question is from a test which asked what would be the most suitable reagent for the above reaction
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How do you calculate the internal energy of a mixture of real gases?
Is there an equation to calculate the internal energy of a gas mixture, or is it too complicated to be computed so simply? I know that there's $E_{internal}=N(degrees of freedom)\frac12kT$ and $(P+a\...
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How Amorphous solids are converted to Crystalline?
I know about a process of Annealing where a crystalline solid is heated to its melting point and then cooled rapidly so as to form amorphous solid which has random crystallite in uts structure.
But ...
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what's the importance of "s" character in hybrid orbitals?
I am a high school student and I am learning about hybridization, my teacher told me that it is due to the "s" character in the hybrid orbital that they can arrange themselves so that the ...
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I was wondering if anyone could provide me with a method to solving as I do not know what I am doing wrong after multiple attempts?
A portland cement sample contained 20% SiO2 by weight derived
from two silicate compounds, SiO2.2CaO and SiO2.3CaO that
are present in the cement in the mole ratio 3 : 4. Determine
the percent by ...
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If Standard Reduction Potential and Standard Oxidation potential are equal in magnitude and opposite in sign?
If Standard Reduction Potential(SRP) and Standard Oxidation potential(SOP) are equal in magnitude and opposite in sign ,
Then as per this
As we know SRP of H2O is -0.83 V as per this SOP of H2O should ...
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