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## Screw axis in P21c space group

I am having some trouble with understanding glide axis. The following is a question asking to reconstruct the full unit cell: And the following is the answer to the question: I have highlighted an element which I want to focus on. I understand the rotation of 180 degrees and translation of 1/2 of a unit […]

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## Screw axis in P21c space group

I am having some trouble with understanding glide axis. The following is a question asking to reconstruct the full unit cell: And the following is the answer to the question: I have highlighted an element which I want to focus on. I understand the rotation of 180 degrees and translation of 1/2 of a unit […]

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## Reason behind more Reactivity of Unsaturated Hydrocarbons

My textbook says that unsaturated hydrocarbons are more reactive than saturated ones. But double and triple bonds are stronger than single bonds. What is the explanation for this?

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## Which is a stronger nucleophile in aprotic solvent: water or hydrogen sulfide?

Which one is the stronger nucleophile in aprotic solvent: $\ce{H2O}$ or $\ce{H2S}?$ According to my notes, nucleophilicity order is directly proportional to basicity order in an aprotic medium, and is inversely proportional to basicity order in protic medium. And $\ce{H2O}$ is a stronger base than $\ce{H2S},$ so it should be the strong nucleophile, but the […]

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## Can glass be deionized?

Is there a chemical treatment that could remove sodium and calcium ions from the surface of soda-lime glass to turn it into quartz glass, increasing the hardness?

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## What does HClO2 aqueous solution decompose to in an open environment?

I looked up the decompositions of diluted $\ce{HClO2}$ aqueous solution (used in a disinfectant) to know if it is safe to use on some substances, such as metal, wood, leather or skin. However, the chain I found leading to $\ce{HClO4},$ which is a very strong acid.  \begin{align} \ce{5 HClO2 &→ 4 ClO2 + HCl […]

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## Intermolecular Forces of Attraction

Imagine a bottle 85% filled with water and the rest is just air, and the cap is closed. Here are now my questions. Since the cap is closed completely, the air bubble is formed. Is that air bubble compressed? In other words, since air has the least force of attraction between its molecules, they are […]

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## Will NH3 gas decompose into N2 and H2 at 250 degrees celcius?

If I heat ammonia gas to 250 degrees celsius, will it decompose into its basic components – N2 and H2? What temperature is required for the reaction to occur?

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## How were the bond lengths of benzene determined?

How did people manage to find out the bond length of benzene? What were the methods and apparatus they used to figure it out? This question arose while reading this passage from Organic Chemistry, seventh Edition by Paula Yurkanis Bruice Controversy over the structure of benzene continued until the 1930s, when the new techniques of […]

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## What is the specific heat capacity of regular corrugated cardboard?

I am testing out different materials with different specific heat capacities and their correlation with soundproofing (e.g. wood, cork, styrofoam, etc.) but I can’t seem to find the specific heat capacity of normal cardboard anywhere.