3
votes
1answer
71 views

What's wool made of?

For example, silk is made of fibroin. But what's wool made of?
2
votes
0answers
8 views

What material is an Inkjet transparent printing film (slide) made of?

I don't mean photographic film/film base but rather the A4/Letter sheets of transparent film that was used in slide projectors during lectures. For example see this.
-1
votes
0answers
6 views

How to express uncertainty containing values with error progression?

A student reported the mass of 10 glass beads as $2.507 \pm 0.015~\mathrm{g}$. What should the student report as the mass of one bead? A student reported the density of ten glass beads as ...
-1
votes
0answers
7 views

Balancing of combustion of benzene through oxidation number method

Could someone please show me how to balance this equation by oxidation number method? $$\ce{C6H6 + O2 -> CO2 + H2O}$$
2
votes
0answers
6 views

What is the relationship between the molecular weight of a polymer and that of polystyrene?

So, I read in a similar chemistry thread that you can get Mn and Mw of the polymer of the interest by comparing the result of the sample obtained from GPC/SEC with the standard known molecule weight ...
0
votes
0answers
13 views

What tools can be used to estimate binding energies?

I want to estimate the binding energies of various molecules. What are the analytical and numerical tools I can use for this purpose? In particular I'm interested in bonding energies of dyes to ...
0
votes
0answers
5 views

How pigments actually function as colorants?

Pigments are insoluble colorants that have no affinity to the substrate. So how can they function as colorants if they "can't stick"? Are pigments always applied together with a "binder"?
2
votes
0answers
11 views

How do I make a dysprosium chloride solution from dysprosium oxide?

I know that dysprosium oxide is insoluble in water. I was told that I need to add concentrated $\ce{HCl}$ to the compound and then evaporate the $\ce{HCl}$ off. From looking at the reaction equation, ...
0
votes
0answers
9 views

How to choose a colorant for a given substrate?

I know there are volumes of International Colour Index (homepage, wiki, paper), but I can't really extract from there for example what red colorants are compatible with both silk and polyester, etc. ...
2
votes
0answers
18 views

Redox Half Reaction - Reduction

I can't seem to figure out this redox reaction. Is the charge on the Carbon in the $\ce{CO2}$ supposed to match the charge on the Carbon in the $\ce{CH3COO-}$? I am supposed to build a half ...
2
votes
1answer
12 views

Why and how does lycopene absorbance increase with heating?

Lycopene, which is a carotenoid and a phytochemical is the main reason for why tomatoes are radio-protective. Source 1 . Source 2 Let's cut to the chase: I was wondering if this claim of The ...
5
votes
2answers
144 views

What are the products of the reaction of 1-methoxycyclohexene with dilute hydrochloric acid?

I am struggling with the following question in my problem sheet: "When 1-methoxycyclohexene is treated with dilute aqueous hydrochloric acid, methanol is produced along with another organic product. ...
8
votes
2answers
32 views

Does increasing concentration of copper sulphate decrease or increase its conductivity?

I am a high school student and for my chemistry lab, I did an electrolyis experiment on how the changing concentration of electrolyte (copper sulphate) will change the rate at which the copper is ...
-1
votes
1answer
18 views

Will isopropyl alcohol dissolve the coating/paint of a notebook?

The notebook is a Dell Inspiron 6400 and the coating/paint is the silver on the palmrest and back cover. It says 99,4% on the container of the isopropyl alcohol.
2
votes
0answers
19 views

Effect of radioactivity on bonding [duplicate]

What effect does $\alpha$ or $\beta$ decay have on the bonding in molecules? In particular the example I was thinking of was if you have a radioactive metal at the centre of a complex ion. I had a ...
4
votes
1answer
31 views

Magnetic stirrer with hot plate

I did not know there are products such as a magnetic stirrer with a hot plate, enabling one to apply heat and stirring to a solution with relative ease. Did I understand correctly, that device needs a ...
2
votes
0answers
15 views

Preparing CdSe electrodeposition bath

What is the best way of preparing an aqueous solution containing 5 mM $\ce{CdSO4}$, 1 mM $\ce{SeO2}$, 0.5 M $\ce{Na2SO4}$ and adjusting pH to 3 by adding 0.5 M $\ce{H2SO4}$? What is the ...
2
votes
1answer
27 views

What is the geometric formula of CaI2 and AlCl3

Well, I think $\ce{CaI2}$ is the same as $\ce{BeH2}$ and $\ce{AlCl3}$ the same as $\ce{NH3}$, but I'm not sure since $\ce{I}$ and $\ce{Cl}$ have their own pair electrons and I don't know if this ...
2
votes
1answer
42 views

Are there yellow metals besides gold and copper?

Are there yellow metals besides gold and copper? Are there metals with color different than yellow and grey?
2
votes
1answer
19 views

Heat energy of phosphoric acid evaporation

Looking at a system in which phosphoric acid is concentrated in an evaporator which uses a constant recycle stream with a heat exchanger in this stream to heat the acid so that water evaporates out of ...
-2
votes
0answers
13 views

removeable polymer coating [on hold]

i need an removable polymer coating material should have following properties:- Fast drying time (without any hardener) Elasticity Spray-able Transparent Polyurethane Thinner-base Peel-able ...
4
votes
1answer
38 views

What is Nano Zinc Oxide?

First of all, I have zero chemical background, but I seek for an easy explanation about Nano Zinc Oxide. I was told that the name of "Nano Zinc Oxide" couldn't possibly exist. Instead, it should be ...
3
votes
1answer
31 views

Does C2H5OH react with K to form C2H5OK and H2?

I'm finding information in Google with the keyword (C2H5OH + K) to find the reaction between $\ce{C2H5OH}$ and $\ce{K}$ and found very little information about it. Just 2-3 related results with ...
4
votes
2answers
78 views

What's the difference between perfect and ideal gas?

There are all kinds of different dinstinctions in the internet, and I'd like to see what you guys thought. Actually, I've been asked if the heat capacity of an ideal gas es independent of ...
4
votes
1answer
24 views

Does mercury fulminate really look like crystal methamphetamine?

In the AMC series Breaking Bad , Walter (aka Heisenberg) smuggles in a bag of mercury fulminate under the guise of crystal methamphetamine and threatens to blow the room up if he doesn't get his ...
0
votes
1answer
26 views

Calculating boiling point of a solution

What is the boiling point of an aqueous solution that has a vapor pressure of $23.0~\text{torr}$ at $25~^\circ\text{C}$? $(P^\circ_{\ce{H2O}}=23.78~\text{torr};~K_b= 0.512~^\circ\text{C/m})$ To ...
2
votes
2answers
22 views

Is there anything akin to molecular chirality for crystalline?

For example, in hexagonal closed-packed (HCP) structure, the atoms may be arranged in ABAB stacks or ACAC stacks. Can these two be considered enantiomers? Do they possess different solid state ...
-1
votes
1answer
14 views

Other Ways to Find Molar Mass of Compound [on hold]

What other ways are there to find a compound's molar mass - without use of periodic time to get the sum of the elements? And why does it work?
-1
votes
0answers
26 views

About Hydrogen obtained from electrolysis [on hold]

Tell me about the hydrogen(H2) properties: What is the temperature released during electrolysis? Which material is used for storage of hydrogen obtained from electrolysis? What is the pressure ...
-1
votes
0answers
33 views

Accidentally Drank Deionized Battery Water [on hold]

I accidentally drank deionized Battery water whose ph value is Ph 7.00+0.25, TDS = 0-2mm. I just want to know what damage can it cause on my health. So far i did not feeling any effect on my health, ...
-1
votes
0answers
32 views

Protons… Why not electrons? [on hold]

Protons,neutrons are binding together and forming nucleus.. The reason for their stability is strong nuclear force which is overcoming electrostatic repulsions. The question is from where ...
1
vote
2answers
46 views

Is probability of finding electron changing here?

We all know what is a wave function. There is a technique to convert non normalized wave function to normalized wave function. In case of non normalized wave function integration of square of wave ...
2
votes
1answer
18 views

extracting carbon nanotubes from graphite

I am searching for the carbon nano tubes for very low cost.I have one idea about the graphite which is in the tip of the pencil, can be converted as the carbon nano tubes.is it possible? if it is ...
3
votes
1answer
18 views

How to find the molar mass of an unknown metal carbonate through a gas evolution reaction?

As part of a pre-lab exercise in Chemistry, we went through the necessary calculations to identify an unknown metal in a metal carbonate. The method was gas evolution by means of hydrochloric acid ...
5
votes
1answer
39 views

Are matrices a good way to do stoichiometry?

I was never taught in school to use matrices to balance my equation in stoichiometry. But I recently started to review my chemistry and, as I have taken linear algebra, I was suddenly struck by the ...
3
votes
1answer
19 views

What happens to the NADH produced by lactate oxidation?

I first want to note that I'm a layman attempting to gain an understanding of metabolism by reading resources on the internet with only a little understanding of chemistry. I've hit a snag: Oxidation ...
1
vote
1answer
43 views

How to calculate the concentration of all relevant species in a buffer of a given pH?

You prepare $1.0~\mathrm{L}$ of a $0.25~\mathrm{M}$ acetic acid solution with a final $\ce{pH}$ of $6.0$. What are the molar concentrations of all relevant acetic acid species ($[\ce{HA}]$ and ...
2
votes
2answers
34 views

What are the effects of adding water to a system at equilibrium?

Given the reaction $\ce{NaCl~(s) <=> Na+~(aq) + Cl^{-}~(aq)}$. $\ce{NaCl}$ is added to water and equilibrium is reached. Does the reaction shift to the left/right/not shift at all if more ...
2
votes
1answer
32 views

Titration of bases against HCl

Suppose I take three bases in a solution, $\ce{NaOH}$, $\ce{Na2CO3}$ and $\ce{NaHCO3}$, and I titrate this solution with $\ce{HCl}$. Since the strengths of the bases are different, does it mean that ...
2
votes
1answer
20 views

Why are ionic compounds bad conductors of electricity in solid state?

I understand the fact that ionic compounds are good conductors of electricity in molten state. But why aren't they good conductors in solid state. Cannot ions vibrate about their mean position and ...
5
votes
3answers
68 views

Dehydration of methylcyclobutanol

In one of the exams I saw it was written that dehydration of 1-methyl-cyclobutanol yields cyclobutylmethylene (double bond outside the ring) which is the anti Zaitzev product, instead of ...
9
votes
7answers
2k views

Are there any good examples of commonly ingested molecules that contain particular toxic individual elements?

In the house on my own and an article popped up on my feed with the following statement: While the Government has insisted the chemical is safe, cadmium is recognised as a cause of lung cancer ...
2
votes
1answer
20 views

Cathodic protection of tubes in Shell & Tube Heat Exchanger

Our Cl2 liquifier is of the following type: It is entirely made of mild steel (shell as well as tubes plus the connecting pipelines). At shell side there is Freon (R-12) with its refrigeration ...
7
votes
3answers
1k views

Temperature of an atom

I read somewhere that the temperature of an atom is not defined. The definition of temperature is only for larger systems. Why is this so?
1
vote
1answer
24 views

What type of reagent can convert nitrobenzene to N-phenylhydroxylamine? [on hold]

We are required to convert nitrobenzene to N-phenylhydroxylamine. Under what conditions and/or reagents can it be achieved? Please justify also the same.
5
votes
1answer
40 views

Why is predicting products of chemical reactions difficult? [on hold]

I was going to ask whether there are software that could be used to predict the products of any given chemical reaction. However, I then noticed these two earlier questions Chemical software for ...
4
votes
1answer
29 views

Calculating the pressure of an ideal gas that undergoes isothermal expansion

A 2.35 mole sample of an ideal gas, for which $C_{v,m}=3R/2$ initially at $27^{o}$C and $1750$ kPa, undergoes a two stage transformation. For each of the stages described in the following list, ...
2
votes
0answers
26 views

The sponge isn't foaming up, why?

When I add dish soap to a sponge it is able to foam up. But if I leave the sponge alone for an hour, it doesn't foam up, not even if it is wetted. Why? The sponge should still contain dish soap an ...
4
votes
1answer
52 views

Why neutrons are neutral?

If electrons have a negative charge and protons have a positive charge then how come neutrons have zero charge without consisting of protons and electrons ? (Excuse my bad English)
2
votes
2answers
29 views

Hydrazine as a reduction agent

When using hydrazine as a reduction agent to reduce graphene oxide, which is the product hydrazine oxidises to?

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