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$\ce{SiCl_4}$ does not quite dissolve in water; rather, it reacts with water. So does $\ce{CCl_4}$, albeit extremely slowly, so for most purposes one may safely assume it doesn't. The difference is mostly due to the atomic size of C and Si. Smaller С atom is completely blocked off by four bulky chlorine atoms, so the water molecule can't reach it. Larger Si ...


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No, neither C nor Si have to be present in a polymer. IUPAC defines polymer simply as A substance composed of macromolecules. In turn, there is no limitations on the elements the macromolecules may consist of. In fact, there is an extensive class of inorganic polymers free of carbon and silicon.


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a for amorphous is totally correct. Also used in other publications like here.


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Actually a $\ce{Si-Cl}$ bond is much stronger than a $\ce{C-Cl}$ bond. It takes about 90 kcal/mole to break a $\ce{Si-Cl}$ bond, but only around 81 kcal/mole to break a $\ce{C-Cl}$ bond. The strengths of the corresponding $\ce{Si-O}$ (110 kcal/mole) and $\ce{C-O}$ (85 kcal/mole) bonds also need to be considered. In the silicon reaction we need 90 kcal/...


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Answers: Consider the mass and kinetic energy of an electron or of an ion of nitrogen or oxygen, and the reactivity with carbon. Good question! It would be interesting to see the relative abundance of allotropes of carbon deposited from a filament in vacuo. There is a metallic glisten to the deposit, so there might be graphite, carbon nanotubes or ...


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The important thing to consider is the chemistry of carbon dioxide in water, forming carbonic acid. Note also that calcium hydroxide is at edge between being a strong or a weak base. $$\begin{align}\ \ce{CO2 ^ + H2O &<=> CO2 . H2O} \tag{1} \\ \ce{CO2 . H2O &<=> H2CO3} \tag{2} \\ \ce{H2CO3 &<=> H+ + HCO3^-} \tag{3} \\ \ce{HCO3^- ...


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There is not many simple tests. One of possible tests would be passing gas through neutral solution of suitable acidobasic colour indicator, e.g bromthymol blue, turning green to yellow while getting slightly acidic. But it would not be specific, any acidic gas would do that. You have not mentioned context, why do you need to know ? Or is it just homework-...


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Since both are metaloids, or semiconductors, look for the criteria that define them. In particular, electronegativity or ionization energy are important.


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$\ce{CO2}$ is emitted yes. It is not formed in the usual combustion manner however. There a likely two routes to $\ce{CO2}$ formation during wood pyrolysis. Either through the elimination of carboxyl groups e.g., $$\ce{PhCOOH -> Ph + CO2}\text{,}$$ or by a water gas shift reaction: $$\ce{H2O + CO -> CO2 + H2}\text{.}$$ My opinion is that the latter is ...


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It would have been helpful if you have said what kind of polymer-based nanocomposites you would like to create. Yet, I found a good article for the fabrication of poly dimethylsiloxane/carbon nanofiber (CNF)-based nanocomposites. The schematic diagram of experimental procedure is illustrated in following figure (from the Ref. 1). The experimental section in ...


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My worry is that the energy requirements for making soda lime, caustic soda or some other carbon dioxide adsorber will be so high that overall it will result in the emission of more green house gases. Years ago I was touring a waste disposal site where they react waste sulfuric acid with limestone. The boss of the site told me that some years ago someone ...


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