0
votes
0answers
3 views

Link between number of carbon atoms in compound and delta h when combusted

What is the link between the number of carbon atoms/ types of carbon bond in a fatty acid and the amount of energy it releases when combusted as a biofuel.
0
votes
0answers
2 views

Errors while collecting gases over water. (Pneumatic Trough)

What are some possible errors while collecting the volume of a gas through displacement of water in a pneumatic trough? Assume gas is oxygen, for context
0
votes
0answers
7 views

what will be the state of co2

When CO2 is transferred from CO2 cylinder to reactor tank till the pressure reaches 400 bar with temperature at 60*C.What will be the state of CO2 in reactor tank either liquid or gas ?
-2
votes
0answers
9 views

Characteristic properties of (i) metallic conductivity and (ii) semiconduction in solids

I need a brief account of Characteristic properties of (i) metallic conductivity and (ii) semiconduction in solids
0
votes
1answer
17 views

In Diazonium Ion why does N contain 4 bonds?

Nitrogen's valenc number is 3. Sometimes it can form a co-ordinate bond by donating it's lone pair electrons. In diazonium ion N has 4 bonds, then one of those 4 bonds must be a co-ordinate bond. ...
0
votes
0answers
14 views

Why is NO2 stable?

In class, my chemistry teacher told me that NO(g) produced will react with O2 in the air to form NO2 since there is a single electron in the molecule, but I found there still has a single electron in ...
0
votes
0answers
4 views

Redox Reactions in Galvanic Cells

What are the anode, and cathode equations for a redox reaction including lithium manganese oxide? I'm completting an assignment regarding lithium button cells and am having trouble finding a correct ...
0
votes
0answers
10 views

Detail from Integral Evaluation in Szabo (Appendix)

This is a step from Appendix A in Szabo and Ostlund's Quantum Chemistry. In short, the question is how to get from A.20 to A.21. We can factor out some constants in the expressions to get: A.20: $$ \...
0
votes
0answers
26 views

How do I convert Butene-2 to Butene-1?

An explanation would by greatly apprciated. As far as I know the conversion involves Markonikov Rule and Saytzeff Rule.
0
votes
1answer
16 views

How is Amagat's law applicable for ideal gases?

How/Why is Amagat's law applicable for ideal gases? Since the molecules of gas occupy negligible volume then logically for a mixture of ideal gases each gas in the mixture should have volume equal to ...
1
vote
2answers
20 views

Nomenclature confusion regarding carboxylate and ester

Suddenly thought about this 2 compounds that have the same(?) name? Aren't both of them methyl propanoate? How do we differentiate them apart name wise?
0
votes
0answers
14 views

Manganese charged monatomic ion

Doing some research I cannot seem to find a second common charged form of Manganese? Only can find Mn²⁺, but I need a second. For example for Mercury there is Hg₂²⁺ and Hg²⁺. Anyone got any ideas?
2
votes
0answers
12 views

Is there any simple way to introduce oxyacids?

Once we've learned basic oxides, hydroxides are straightforward. However, learning oxyacids from acid oxydes seems more difficult. Take the following reactions: $$\ce{CO2 + H2O <=> H2CO3} \\ \...
1
vote
0answers
10 views

Determining absorption spectrum, magnitude of Δo and spin for Iron Oxalate

Iron Oxalate ions form an emerald green solution when dissolved. If the ions in solution appears emerald green to our eyes, what color of visible light is it mostly absorbing? What does that tell you ...
-1
votes
0answers
14 views

Spectroscopy of 1-bromo-3-methylbutane

using the MS spectrum, can you please help identify the possible fragments of 1-bromo-3-methylbutane. Also how to identify it using the IR spectrum.
0
votes
0answers
9 views

What does “off-hue” constitute in the context of analyzing a sample using the Pt-Co color scale?

ASTM D1209, the method describing how to perform the Pt-Co color scale test for a sample, recommends reporting material that can't be matched to a particular standard as "off-hue". For color based ...
0
votes
0answers
15 views

Cast Iron Vinegar evaporation [on hold]

I soaked my rusty cast iron pans in a solution of vinegar and water. The solution evaporated and left a hard crusty layer on my cast iron pans. What is it, why did it form (besides the fact that got ...
2
votes
1answer
43 views

Are the 2s and 2p subshells degenerate in the He+ ion?

I know that the 2s and 2p (as well as 3s, 3p, and 3d) electron subshells are degenerate in the hydrogen atom. I was wondering if they are also degenerate in other one-electron species, such as the $\...
-1
votes
0answers
21 views

What is the net ionic equation of the following? [on hold]

Aqueous chlorine is added to a solution of aluminum bromide in a single replacement reaction which forms no precipitate and bromine liquid. Since this is a single replacement reaction, it will take ...
-2
votes
0answers
25 views

What is the product of this reaction? [on hold]

How will carbocation be formed, will it form by leaving of N2+ or by attack of hcl on OH group and what product do we finally get here?
-2
votes
0answers
18 views

discription about riemer tieman reaction [on hold]

I want to know the mechanism and the intermediate involved in riemer tieman reaction.I also want the names of the compounds involved in this reaction.
-1
votes
0answers
20 views

Reaction of Alkyl halides and alcohols [on hold]

I searched for the reactions of alcohols with alkyl halides but did not find any good stuff. My professor asked me the following question. Which one of the following is more reactive with Ethanol(...
0
votes
1answer
37 views

When using a “dilute hydrochloric acid” solution, how diluted should it be?

Quite often when reading through some instructions or documentation or an outline that I've found online (EG: acid-base extractions), theres a step that involves using a "dilute hydrochloric acid ...
0
votes
0answers
11 views

Rate of hydrolysis of aspirin [on hold]

I was wondering if anyone would be able to check my method for my Chemistry Internal Assessment on the Rate of hydrolysis of Aspirin. Independent variable (I am changing): temperature (degrees ...
0
votes
0answers
21 views

How would one disassociate the carboxylic acid on the end of a perfluorooctanoic acid molecule?

This is what a perfluorooctanoic acid molecule looks like. The carboxylate on the end would normally disassociate in water because carboxylic acids are weak, but because of the fluorocarbon tail, the ...
0
votes
0answers
27 views

Deciding between conjugation in dehydrated product and possibility of pinacol-pinacolone rearrangement

I can't decide whether the compound will get dehydrated (due to extended conjugation in the product) or if it will opt for pinacol-pinacolone rearrangement?
-1
votes
0answers
11 views

vibrational spectroscopy [on hold]

Calculate the reduced mass of HCL & HF and prove force constant of HCL is > force constant of HF .Given that vibrational frequency of HCL is 288cm & HF is 3958cm .Reduced mass of HCL is 1.63 x ...
0
votes
0answers
14 views

Ultra EVER DRY dilution [on hold]

I want to dilute an industriel coating Ultra Ever Dry (Bottom coating) wich has this composition: Acetone, Xylene and tert-Butyl acetate. I wonder witch is the best solution to use for dilution? ...
4
votes
1answer
34 views

Regioselectivity of bromination of alkenes

Recently, in my chemistry lesson, we were discussing the mechanism of the bromination of alkenes. The teacher brought up the involvement of the cyclic bromonium intermediate. She also mentioned that ...
-1
votes
0answers
21 views

Is cycloalkane an isomer of alkene as they have the same general formula?

I know that cycloalkanes are a homologous series of their own and not an isomer of alkane. But does the same general formula as alkenes make them an isomer of alkene?
0
votes
2answers
19 views

Thermochemistry: What is the difference between the calculation of bond enthalpy and Hess's Law

so I know that hess's law is a indirect way to find the heat of reaction using the known heat of reaction of 2+ thermochemical equation, thus the formula is delta heat of reaction = enthalpy of ...
1
vote
0answers
43 views

How is the structure of triiodide ion (I3-) possible?

I have seen the structure of triiodide ion ($\ce{I3-}$) but I cannot understand why this structure is even possible. I have seen in my textbook that $\ce{I_3^-}$ is formed by combination of $\ce{...
-1
votes
1answer
28 views

Nickel-63 and surge protector / voltage regulator

I've read that nickel-63 is used in surge protectors and voltage regulators. What is it about nickel-63 that makes it particularly suitable for those applications?
2
votes
1answer
62 views

Conversion of oxalic acid to malonic acid

The reagents I have used here are $\ce{LiAlH_4}$ which reduces the carboxylic groups into alcohol.Used $\ce{HIO_4}$ which breaks up the molecule into methanal. Then I applied Grignard reagent which ...
1
vote
0answers
17 views

Reaction of 1,3 Butadiene with HBr in the presence of peroxides

I have learnt that the reaction of 1,3 Butadiene with HBr depends on the temperature as the temperature determines whether the reaction is under kinectic control or thermodynamic control. I believe ...
0
votes
0answers
14 views

What would be the best filtering technique to filter Leachate? [on hold]

I am a student and as part of a project of mine I need to find a way to filter leachate. Would reverse osmosis and nanofiltration be the best option or are there more effective alternatives? ...
0
votes
0answers
19 views

Is bentonite self-healing?

I want to make a shallow pond (3 - 4 ft. max depth) lined with bentonite for both my ducks and willow tree. However, the willow's roots need to be able to penetrate the pond liner and thus the liner ...
0
votes
0answers
12 views

THz Spectroscopy of proteins [on hold]

I want to study aqueous solutions of proteins using THz spectroscopy to gain insights about the different vibrational modes and the solvation dynamics. Can someone suggest some interesting proteins to ...
1
vote
0answers
34 views

What is the simplified chemical equation for this reaction? (Explaining to daughter)

Slime recipes seem to be a craze at the moment. My eight-year-old daughter is swapping recipes with friends and looking up recipes online. This is fantastic because it is home chemistry and an entry-...
-1
votes
0answers
19 views

Sn1/Sn2 reaction [on hold]

Could anyone tell me why this reaction is Sn1 and not Sn2? Ps; there is a small mistake with the phenyl (the OH should not be there)
0
votes
0answers
13 views

How does Benzoyl Peroxide bleach coloured chemicals such as Lycopene? (As compared to Sodium Hypochlorite, conventional bleach)

I know that conventional bleach, Sodium Hypochlorite (NaClO)bleaches coloured chemicals like lycopene by breaking the conjugated pi bonds in lycopene. The O-Cl bonds in bleach causes the Cl to be ...
-1
votes
0answers
17 views

The reference point used in Manometer equations [on hold]

Could someone clarify for me why h is determined from the lower liquid level to the higher lower level instead of say the bottom center of the bend?
6
votes
0answers
36 views

Stability of keto-enol vs. conjugation

I am trying to figure out which tautomer of creatinine: is more stable. We see that the enol tautomer is more highly conjugated: the pi electrons from the alcohol to the double bond to the pi ...
0
votes
0answers
9 views

What is a formal charge, conceptually? [duplicate]

I'm having some difficulty understanding what a formal charge is. I know how to calculate it and what it's used to determine, but I don't know what the numbers represent. For example, in methane, the ...
-1
votes
1answer
39 views

What substances are hypergolic with liquid O2?

If something flammable is surrounded just by oxygen, I should see flame, right? The object would be even surrounded by more molecules than in the case of gas oxygen. On the youtube I see that people ...
-1
votes
0answers
22 views

What is the product of given reaction [on hold]

I have the solution In it shows a carbocation on the right ring But isn't it unstable as it is near the carbonyl group(I effect destabilising the carbication before ring expansion)
-1
votes
1answer
28 views

Stereochemistry of cyclic alkane [on hold]

Why are the following compounds diastereomers ?
-1
votes
0answers
23 views

1 bucket water purification technique [on hold]

I am from Kerala India. We are flooded here. Public water supply is stopped and facing scarcity in drinking water. I remember, in my childhood, after our play, we used to drink water from a well.That ...
-2
votes
0answers
28 views

Stereochemistry [on hold]

The answer to this question is option (d). Can anyone please explain the reason?
-2
votes
0answers
18 views

Mercury hydroxide and phosphoric acid [on hold]

In a reaction between mercury hydroxide and phosphoric acid, how many atoms of mercury are produced?

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