Top new questions this week:
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Suppose you have a single atom of neon, argon or some other noble gas of your choice. While the entire atom is electrically neutral a nearby positron would probably be more strongly attracted to the ...
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I was reading a paper on hyphenating a gas chromatograph with an NMR. The authors describe a proof-of-concept type instrument. We have a couple of NMR experts here in SE, hoping to get some insight. ...
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A while ago, I provided an answer to a question on Biology.SE concerning the half-life of dNTPs under PCR conditions. At the beginning of my answer, I give a qualification:
Caveat: ignoring the ...
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I have a sintered glass funnel stuck in a flask with a 24/40 ground glass joint.
I regularly used this glassware to process very dilute solutions of uncured photopolymer resin dissolved in ethanol. ...
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OK, I'm an engineer that took Aqueous Geochem 6 years ago, so please forgive this basic (get it?) question. But why do the two reactions which start from dissolution of CO2 in water increase pH if ...
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In high school we learn that when a reaction has both negative $\Delta{}S$ (entropy change) and negative $\Delta{}H$ (enthalpy change) it occurs spontaneously at lower temperatures, but becomes non-...
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Before the pandemic, I bought a set of magnetic ball bearings (a few mm in diameter) and attached them to a side panel of my desk (presumably, the panel is iron coated in grey paint).
On returning to ...
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Greatest hits from previous weeks:
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In High School I learned that an exothermic reactions releases energy, while an endothermic reaction needs energy to occur. Now I learned that there is a separate, somewhat similar classification ...
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I know I should divide $\pu{g L-1}$ by the molar mass of the substance, but I don't seem to find the specific answer on Google. So just to be sure:
If I have $10^{-5}~\pu{g L-1}~\ce{Cu^2+}$ solution, ...
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In the crystal field theory (CFT), when the splitting of the d-orbital occurs, it gets divided into two parts.
The upper part with higher energy is the $\mathrm{e_g}$ and the lower part with lower ...
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In the standard Periodic Table layout , all the elements up to 56 are in order i.e are in the same layout table. However, lanthanides and actinides are always shown separately from the layout like in ...
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My chemistry book explains that even though electrons in the $\mathrm{2p}$ orbital are closer to the nucleus on average, electrons from the $\mathrm{2s}$ orbital spend a very short time very close to ...
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I've always been puzzled by this because my teachers happen to use only the KLMN method, but what is the difference between the KLMN and SPDF methods of finding electronic configuration?
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Let's take the $\ce{KOH}$ molecule into account. I know it is a base from literature, but how would one go about determining if a molecule is acidic or basic simply based on the structure of the ...
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Can you answer these questions?
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For an ideal gas undergoing an isothermal process $\Delta U = 0.$
But is the converse true? Let's say, $\Delta U$ for an ideal gas is zero. Is its temperature constant then? Can we say that it's ...
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I don't know the mechanism of discoloration due to phase change.
https://pubs.rsc.org/en/content/articlelanding/2019/cc/c9cc02172h
In the above paper, Cu(I) in CP1 (Figure 1 a) has a tetrahedral ...
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The following reaction mechanism happens in cholesterol synthesis inside human body. I am unable to understand why on earth the hydride shift happens here. I mean its already a tertiary carbocation, ...
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