All Questions

1
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1answer
4 views

Does the amount of solute affect rate of solvation?

I know that in order to increase the rate of solvation, you need to increase how often solute and solvent particles come into contact. You can do it by: agitating the mixture increasing the ...
0
votes
0answers
5 views

Will methane react with methyl chloride?

If no then will it react in any special conditions ? how do you tell if two compounds will react with each other?
1
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0answers
10 views

Why chewing gum gets hardened after drinking water

Basic question, please don't say temperature change, because i've tried, and it never gets back to same elasticity! There must be some other chemistry at work. Even with luke warm water or room ...
0
votes
0answers
5 views

Rate Law with Catalysts

The hypothetical reaction 2A+B $\rightarrow$ C+D is catalyzed by E as indicated in the possible mechanism below. Which rate law best agrees with this mechanism? $\\$ (A) Rate=k[A][B] $\\$ (B) ...
1
vote
0answers
19 views

Does lithium-2 exist?

Lithium has two electrons in $\mathrm{1s}$, filling the first energy level; and one valence electron in $\mathrm{2s}$. Could two $\ce{Li}$ atoms form a bond to create $\ce{Li2}$; like $\ce{O2}$ or $\...
-6
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0answers
8 views

Bonding!! What’s more stable? HF or HI and why?

Are more tightly held bonds more stable?? Why is HF more stable than HI? PLEASE ANSWER AP IN 10 days
0
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0answers
19 views

What am I doing incorrectly with this IR/ Mass spec data?

Hello, I am trying to determine the chemical formula for the following compound. From the IR spec, I see there is a carbonyl present. Moving on to the mass spec, I see an M+ peak of 142, with what ...
1
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0answers
12 views

Higher electron donating strengths stabilizing oxidized states

The literature is full of statements that inorganic complexes composed of ligands with higher electron donating strengths are more reactive when exposed to oxidants (see examples below). For instance, ...
1
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1answer
10 views

Question on mixing of solutions

If 3 L of 1 M NaOH solution is prepared by mixing properties of stock solutions of $x$ L of 2.5 M NaOH and $y$ L of 0.4 M NaOH and no water is to be used, find $x : y$. My attempt: $$3 = 2.5x + 0.4y$...
-1
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0answers
13 views

are resonance structures of following compound possible

are resonance structure of following compound possible if yes then plz draw
6
votes
1answer
220 views

What is the least dense liquid under normal conditions?

What is the least dense liquid under normal conditions, room temperature, one atmosphere of pressure, doesn't combust upon contact with air, also wouldn't kill a human just for being in the same room ...
1
vote
0answers
16 views

Antisymmetrized Product of Strongly Orthogonal Geminal (APSG) method

To get a deeper understanding of electronic structure methods, like Hartree-Fock, MP2, and Coupled Cluster method, there are many small programs (codes) available in Python, C++ or Fortran, for ...
-1
votes
2answers
21 views

Which of the following compounds is NOT an isomer?

Which of the following compunds is not an isomer? I cant figure out how the answer is d
0
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0answers
21 views

What should i do to calculate needed amount and type of filler to be added to increase thermal conductivity of silicone fluid?

I am not chemist. Sorry for that :( but i am trying to educate myself on that topic for past week. So, basically, my idea is to make a liquid thermal conductor, and use it to cool electrical devices. ...
0
votes
0answers
9 views

What type of acid (and how much) needed to generate Chlorine Dioxide gas when added to Sodium Chlorite (for odor removal)?

I have several lbs of Sodium Chlorite (flakes), which I would like to use to generate Chlorine Dioxide gas in order to remove odors from rooms, autos, boats, etc. There are commercial products sold ...
0
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0answers
16 views

Bond lengths among oxo-sulfur compounds [on hold]

The bond length of $\ce{SO3^2-}$, $\ce{SO4^2-}$, $\ce{S2O3^2-}$, $\ce{SOCl2}$, $\ce{SO2}$ in decreasing order is? I can't understand how to separate the bond lengths of $\ce{SO3^2-}$ and $\ce{SOCl2}$ ...
-2
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0answers
16 views
-1
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0answers
12 views

Draw the resonances structures of 4-methylumbelliferone [on hold]

please help me I don't need the structure between acid and basic only resonance structures
1
vote
2answers
49 views

How can I get xyz coordinates of atoms of a unit cell structure from CIF format files?

I'm trying to run DFT or other 1st principle simulation of Pyrope ($\ce{Mg3Al2Si3O12)}$ and Grossular $\ce{(Ca3Al2[SiO4]3)}$ unit cell structure. So, I'm looking for unit cell xyz periodic box ...
3
votes
0answers
31 views

Mechanism for the addition of chlorine to benzene to form hexachlorocyclohexane

I am familiar with electrophilic substitutions of benzene, with chlorine using a halogen carrier catalyst such as $\ce{AlCl3}$, to produce chlorobenzene, and I am aware of the mechanism. But, ...
3
votes
1answer
21 views

What does the slash in polymer nomenclature, e.g. Acrylates/ Beheneth-25 Methacrylate Copolymer, mean?

I was given a task to find SDS-Sheets for polymers/microplastic particles in cosmetics and I am confused, since there are often two chemicals divided by "/", e.g. Acrylates/ Beheneth-25 Methacrylate ...
0
votes
0answers
30 views

Magnetic moment from given CFSE value

Spin magnetic moment of a octahedral complex having CFSE = $– 0.8∆$ and surrounded by weak field ligands can be: A. $\sqrt{15} \space \mu_B$ B. $\sqrt{8} \space \mu_B$ C. (A) & (B) ...
0
votes
0answers
23 views

Simplifying temperature profile

I am given the temperature profile below and the two equations: $$Q = (2\pi R_0)LU_0(T_{1\infty}-T_{2\infty})\tag1\label1$$ $$\frac{1}{U_0R_0} = \frac{1}{h_1R_0} +\frac{\ln(R_\mathrm a/R_0)}{k}+ ...
0
votes
1answer
47 views

IUPAC nomenclature of organic compound

I strongly feel that the answer should be option (1) as the ester functional group has a greater preference over the double bond and hence it should get a lower locant. But the source of the question ...
0
votes
0answers
19 views

Why is the reaction quotient Q always equal to one at standard state?

I understand that at equilibrium, $Q$ is equal to $K$. This should not depend how I express concentrations (as amount of substance concentrations $c$ or as partial pressures $p$ or as molality $b$ or ...
1
vote
0answers
20 views

Why does energy need to be “compensated” in order for solvation to occur?

I am currently learning about the physical properties of alcohols. I understand that the main intermolecular forces between alcohols and water are hydrogen bonds. When these two are mixed, the ...
0
votes
0answers
11 views

Polarity of Cell Electrodes [duplicate]

I understand that the anode in a galvanic/voltaic cell is considered to be 'negative' while the cathode is 'positive'. However, in an electrolytic cell, the cathode is 'positive' while the anode is '...
0
votes
0answers
23 views

Intermolecular oxygen-oxygen-oxygen angles of water molecules making 120 degree

I have calculated the angular orientation of intermolecular oxygen-oxygen-oxygen (O-O-O angles) of water molecules around an atom in 3-Dimension. And i am getting a broad peak distribution around ...
-1
votes
0answers
17 views

What does methyl bromide look like on timber? [on hold]

I have timber from shipping pallets without any treatment stamps. From my research un-stamped pallets may be for domestic use and is therefore not treated in any way. With that said the timber has a ...
0
votes
1answer
29 views

How to get sodium carbonate? [on hold]

Which acid and base reaction gives us sodium carbonate?
-3
votes
0answers
10 views

Mixing materials [on hold]

Can I mix milk baking soda and salt to use it as a scrub? If no why not. And if I added vinegar or turmeric to it will it be useless to my skin. And I want to know what to mix and not to mix.
1
vote
0answers
27 views

Which bond is stronger: 2pπ–3pπ or 2pπ–3dπ?

Which bond is stronger: 2pπ–3pπ or 2pπ–3dπ? Why is it so? I read in my textbook that the latter is stronger, but while figuring it out myself I thought that as the difference in energy of 2p and 3p is ...
-5
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0answers
12 views

Some basic concept of chemistry [on hold]

A sample of ammonium phosphate( NH4)3PO4 contains 3.18moles of hydrogen atoms. The number of moles of oxygen atom in sample is
2
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0answers
15 views

Is there a reason to use bases in electrolysis and acids (eg vinegar) for electroplating?

To me, electrolysis for rust removal and electroplating seem to be the same process, with different metals and goals. However, in seeing electrolysis and electroplating videos, it seems that ...
0
votes
1answer
23 views

Oxidation of 2-Methyl, 2-Phenyl Propane

Considering oxidation mechanism of side-chains in arenes, it is known that side-chains get oxidized to carboxylic group ($-COOH$). Below is a picture of 2-Methyl, 2-Phenyl Propane. When it gets ...
4
votes
0answers
29 views

What, if any, are the differences between radical scavenging and radical quenching?

Hindered amine light stabilizers (HALS), introduced in the 1970s, function mainly as free radical scavengers, although they also may act as quenchers or peroxide decomposers. (Polypropylene: The ...
1
vote
1answer
34 views

What does it mean by 'the residue was taken up in solvent' in synthesis protocol?

The below is a synthetic protocol I need to perform: N-trifluoro acetoxy succinimide Synthesis Trifluoroacetic acid anhydride was added to N-hydroxysuccinimide at 0 °C. The reaction was ...
9
votes
1answer
208 views

Mechanism of the formation of peracetic acid

Wikipedia says that the equilibrium $$\ce{H2O2 + CH3COOH ⇌ CH3COOOH + H2O}$$ occurs. What is its mechanism? The following is my speculation. The first possibility is that $\ce{CH3COOH}$ is ...
0
votes
2answers
35 views

How do I calculate the total volume when i mix 1000 kg of glucose with 5000 L of water

I want to know how to calculate the resulting volume when I mix 1000 kg of glucose into 5000 L of water. How does the calculation change if I'm mixing NaCl into the water, instead of glucose? Or ...
1
vote
0answers
26 views

Free induction decay in NMR (as stated in Pavia)

There is a statement in a very popular textbook of spectroscopy by Pavia (Chapter 3, Intro. to Spectroscopy), it says "The observed FID is actually an interference signal between the radiofrequency ...
-1
votes
2answers
29 views

Comparing solutbility of acetanilide and diethyl ether in water

Would acetanilide be more soluble in water at 25 degrees Celsius because it has an $\ce{N-H}$ and an oxygen that can participate in hydrogen bonding, whereas diethyl ether only has an oxygen?
-2
votes
0answers
27 views

Software for conformational search [on hold]

I need a free software to perform a conformational search on molecules with 10 to 16 rotational bonds. What software would you recommend me? Where can I download it? Where can I find a manual of this ...
-2
votes
0answers
13 views

Which of the following ion will form most water soluble hydroxide? (A) K+ (B) Ni2+ (B) Zn2+ (C) Al3+ [on hold]

Which of the following ion will form most water soluble hydroxide? (A) K+ (B) Ni2+ (B) Zn2+ (C) Al3+
0
votes
2answers
72 views

Water Gas Shift Reaction

For the extremely important water gas shift reaction shown below, the $K_c = 3.491$ at a certain temperature. What are the equilibrium concentrations of all the components of the reaction if $\pu{0....
0
votes
1answer
53 views

How should we express concentrations and partial pressures in ΔG=-RTlnK? [duplicate]

I understand that $K$ will be dimensionless. Let's say an equilibrium involving $K_p$ and the reaction is $\ce{A -> B}$, $K_p$ will be dimensionless. If the reaction $\ce{A + B -> C}$, then ...
1
vote
4answers
40 views

What kind of system is required for dynamic equilibrium to be set up?

Most websites and books mention a closed system, but technically isn't an isolated system required? If energy can be transferred, then the position of of the equilibrium will continuously change and ...
-1
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0answers
56 views

Type of energy stored in links between two atoms [on hold]

What type of energy is stored between link of two atoms? 1] Thermal energy 2] Nuclear energy 3] Chemical energy 4] Potential energy
-1
votes
0answers
23 views

Are reactive and active exactly the same terms in EAS?

I have understood the two terms as: When we say that a substituted benzene ring is reactive we mean the same thing as calling the reaction of potassium and water highly reactive. When we call a ...
-1
votes
0answers
13 views

Confused in hybridisation [on hold]

I stumbled upon a compound [Ni(Nh3)6] ^2+ which has Nh3 as a strong field ligand. Which implies that pairing will occur and only one last d-orbital will be left with no electrons. But I couldn't ...
0
votes
1answer
23 views

Oxidation reaction of dimethylselenide / Selenourea with hydrogen peroxide

For my paper, I need to find the reaction between $\ce{(CH3)2Se2}$ and $\ce{H2O2}$ and between $\ce{SeC(NH2)2}$ and $\ce{H2O2}$. The mechanism below shows how I think it goes. The reaction should ...

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