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Which gas has the highest Ionisation Potential?

I know that Inert gases have the highest IP. But, some compounds have been formed with Argon, Xenon , Krypton as well (in some extreme conditions). Also, Helium has 2 valence electrons but others have ...
-1
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1answer
27 views

Finding concentration of hydronium ions in water after adding hydrogen chloride gas

A sample of hydrogen chloride gas, $\ce{HCl}$, occupies $\pu{0.932 l}$ at a pressure $\pu{1.44 bar}$ and at a temperature of $\pu{50^\circ C}$. The sample is dissolved in $\pu{1 l}$ of water. What is ...
-2
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0answers
20 views

Derivation of an expression for difference in C_p and C_V of a thermodynamic system [closed]

Q$1$: Derive the following expression indicating the difference between the heat capacities of a thermodynamic system. $$C_p-C_V=\left[V-\left(\frac{\partial H}{\partial P}\right)_T\right]\left(\frac{\...
-2
votes
1answer
9 views

Preparation of a 0.5% Cellulase solution

Is the preparation of a 0.5% cellulase solution as self-explanatory as adding 0.5 g of cellulase enzyme in 100 mL of distilled water, or must a pH buffer be applied as well? Further, should a ...
-1
votes
1answer
36 views

Finding the chemical formula for an ionic compound made using iridium and nitrite ion

What is the most likely chemical formula for an ionic compound involving the elements iridium and nitrite? The charge on the polyatomic ion $\ce{NO2}$ is $-1$, whereas $\ce{Ir}$ is a transitional ...
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0answers
44 views

How to use NMR readings to determine the molecular structure of a compound? [closed]

A question in my exam came as follows: How is NMR used in the determination of structure of organic compounds? I have studied NMR spectroscopy and I know how to determine values using an NMR ...
0
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0answers
38 views

Kinetics question regarding Rate Law

The acid catalysed hydrolysis of an compound $\ce{A}$ at $\pu{303K}$: $$\ce {A ->[$k$] B}$$ has a half-life of $\pu{100 min}$ when carried out in a buffer solution of $\mathrm{pH=5}$ and $\pu{10 ...
1
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2answers
49 views

Atoms visualisation

In 7th class I was been taught that in an atom, electrons revolve around shells and the electrons with higher energy level are placed likewise in the shell above of that electron: In 11th class I ...
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0answers
18 views

Turn Alpha Helix into Beta Pleat

Beta sheets have the peptide backbone parallel whilst the alpha helix has a curled backbone. But the thing I can't get around my head is why would the same protein always fold into one of these shapes?...
-2
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0answers
17 views

Entropy change formula

Why does in the formula of entropy change the conditions of isothermal and reversible are chosen for heat absorbed or released
-3
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0answers
39 views

Do atoms gain or lose all the electrons at once or one by one?

We all know atoms gain or lose electrons to attain stability. So, my question is: Do they lose or gain all the electrons(to be donated or gained) at once or step by step i.e, one by one? For example: ...
2
votes
1answer
69 views

Strength of nucleophiles among SN1 and SN2 reactions [closed]

As per the theory of chemistry, we say that unstable carbocations undergo SN2 reactions as it involves strong nucleophile. As a consequence, it does not lead to the formation of reaction intermediate, ...
0
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0answers
17 views

Entropy change when temp of system and surrounding is same

Can entropy change occur if both the system and the surroundings are at same temperature? In the case of freezing of water at $\pu{272 K}$ $$∆S_\mathrm{sys} = \pu{-21.85 J K-1 mol-1},$$ and $$∆S_\...
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0answers
24 views

Major product from allylic halogenation of alkenes

Allylic halogenation of butene happens in the following way: The RDS of this radical chain mechanism is allylic hydrogen abstraction ($\ce{H_a}$) from the allylic position to give a 1° allylic ...
0
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0answers
38 views

Priority of factors while deciding acidic strength / stability of conjugate base (oxyanions)

I am facing a lots of problem while deciding acidic strength. I am unable to figure out that which factor would be the deciding one or what is the priority order. My approach For comparing acidic ...
-4
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0answers
29 views

Organic chemistry question [closed]

Can anyone pls solve the given question that :-> How many functional groups are present in the following molecule?
0
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1answer
37 views

What explains the case hardening color effect?

Year 11 chemistry student here. I'm curious about how the case hardening effect works on metals. I know that when the electrons gain an energy 'level' or lose an energy 'level' they emit light at ...
0
votes
1answer
40 views

Calculating numbers of moles at equilibrium given the volume of mixture and initial concentration of reactants

The equilibrium between three substances, A, B and C Is shown below. $$\ce{A(g) + B(g) <=> C(g)}$$ Initially there were $\pu{0.1 mol}$ of A and $\pu{0.2 mol}$ of B in the reaction mixture. A and ...
-1
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0answers
11 views

Non-water based binder for powder

I am looking for a product that can bind dry powdered charcoal and a dry super absorbent polymer together until it comes into contact with water. Additionally the end-product should be biodegradable (...
-5
votes
0answers
26 views

Trying to understand electrical conductivity ranking of these 4 compounds [closed]

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing ...
-2
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0answers
13 views

In a SAXS experiment, you observe strong Bragg peaks at q values of x, y and z. What are the d-spacings of the corresponding diffracting planes? [closed]

I am struggling with how to relate the q values (for example x y and z) with the corresponding d spacing for SAXS.
1
vote
1answer
72 views

What lab equipment did Marie Curie use to isolate radium?

My experience in growing crystals for condensed matter physics has been sealing grams of material in ampoules which get heated in laboratory furnaces, so I don't have the experience to understand how ...
0
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0answers
17 views

Performing a Redox Titration on a Vitamin C Sample Solution Containing Cellulase enzymes

I was wanting to performing an Iodometric Redox Titration on a Vitamin C sample solution created from allowing diced citrus fruits to sit in a water + cellulase solution. Because vitamin c is water ...
0
votes
2answers
33 views

Copper anode dissolves in electrolysis of copper sulfate solution

I did an experiment with copper sulfate where you place two copper rods in an aqueous solution of copper sulfate. You apply an electric current and copper metal builds up on the cathode. I noticed ...
1
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0answers
23 views

Strange Distillation Behavior

I was attempting a fractional distillation with 1mL water and 1mL propylene glycol, and I’ve been encountering strange behavior with the heating of the mixture. The heating curve shows strange “spikes”...
-3
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0answers
21 views

Is it possible to make Aluminium Hydroxide from Aluminium Oxide? [closed]

I am doing a lab, and it requires aluminium hydroxide, but unfortunately I do not possess some, however, I do have aluminium oxide. I was wondering if it was possible to make aluminium hydroxide from ...
2
votes
1answer
37 views

Specific Heat Ratio for a perfect gas mixture

I am reading Rocket Propulsion Elements by George P. Sutton & Oscar Biblarz, 9th Edition. In the fifth chapter, I was introduce to the specific heat ratio k for the perfect gas mixture, Eq. 5-7. ...
1
vote
1answer
22 views

How to remove CH3 labels from a molecule's image? [OpenBabel in Python]

I would like to remove CH3 labels from svg images generated in openbabel in Python. I am thinking I should use ...
-5
votes
0answers
13 views

Co(NO3)2+Na3PO4=Co3(PO4)2+NaNO3 [closed]

Co(NO3)2+Na3PO4=Co3(PO4)2+NaNO3 How do I find initial moles?
-1
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0answers
22 views

Graphene in Lithium-ions batteries: why?

I have recently been reading about the amazing discovery of a super-material: Graphene. This one carbon-layer chemical is not only one of the most resistant materials ever known, but also one of the ...
-1
votes
0answers
36 views

metal ion complex with carbon dioxide

Using ORCA and Avogadro, I stimulated the possible MO orbitals of carbon dioxide complex with lithium ion (Lithium chloride) and cesium ion (cesium chloride) each at a time. i expected that Due to ...
3
votes
1answer
51 views

How does liquid gallium interact with a gold leaf

I would like to know what happens when gold leaf comes into contact with liquid gallium. Will the gold dissolve into (alloy with) the gallium, wet the gallium or have no reaction with gallium? The ...
-3
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0answers
30 views

Diagrams for the wave functions [closed]

I came across a question in one of the papers of JEE Advanced, which i didn't understand. The question is as follows: $P$ is the probability of finding the $\mathrm{1s}$ electron of hydrogen atom in ...
5
votes
2answers
1k views

Three stacked arrows, what does it signify?

I was checking the mechanism for the Lossen Rearrangement, when I came across the chemical reaction denoted as follows: I couldn't find any resource where this notation was talked about. What do the ...
-4
votes
0answers
12 views

Why do carboxylic acids have higher boiling points than equivalent alcohols? [closed]

Why do carboxylic acids have higher boiling points than their equivalent alcohols isomer?
1
vote
1answer
48 views

Why is the first ionization enthalpy of molecular O2 less than atomic O?

A cousin of mine asked for my help to answer one of his homework questions. It stated- Explain why- The first ionization energy of molecular oxygen $\ce{O2}$ ($\pu{1175 kJ mol-1}$), is lesser than ...
0
votes
1answer
49 views

Brittleness of Ice?

I am curious as that I know that various materials can be subjected to fragility from ductile-brittle transition via temperature, where an item is more likely to fracture of shatter such as increase ...
-4
votes
0answers
22 views

Number of Phases [closed]

How many phases are there in a system that consists of three pieces of solid AgBr, one piece of solid AgCl, and a saturated aqueous solution of these salts. Is the answer 3 since the aqueous solution ...
-1
votes
1answer
22 views

Any plastic for long term storage of Puriss. Ethanol?

I'm being offered to share some puriss Ethanol. Can I store it long term in any plastic container without the slightest contamination/reaction from the plastic? I have HDPE, PET, but I could buy ...
-1
votes
0answers
27 views

Resonance and basicity

A base donates a lone pair or accepts an $\ce{H+}$. Thus if a copound has resonance where the lone pair is involved, there is less tendency to donate a lone pair and basicity decreases. But if a base ...
0
votes
0answers
41 views

Resonance Structures of 9H-Fluorene

How many resonance structures does a 9H-Fluorene carbocation have with a positive charge on the top of the cyclopentane ring (a secondary carbocation)? I came up with four different structures.
0
votes
0answers
22 views

Does salt affect hydrogen bonding in water?

Does salt affect hydrogen bonding in water? In some pictures I've seen then water is surrounding the Cl and Na ions, but will they still have like strong hydrogen bond? Will the water tension be the ...
-4
votes
2answers
39 views

What is the coordination number of La in LaAlO3?

I am not sure whether the coordination number of La is 8 or 12 in LaAlO3 which Al3+ cation act as cubic centre while La3+ cation locates of cubic corner. How to find the coordination number for this ...
-2
votes
0answers
36 views

Is glycine molecule a polar or nonpolar molecule? [duplicate]

Infos say that glycine is nonpolar as an amino acid but it is a POLAR molecule. what is more valid? What is the distinction between the two?
3
votes
0answers
61 views

How does Mars rover Curiosity's ChemCam's infrared laser produce a 100,000 K plasma plume (kT = 8.6 eV)?

Mars rover Curiosity's ChemCam uses a pulsed diode-pumped solid-state laser (DPSS) at 1064 nm to excite material on the surfaces of rocks up to 7 meters away, and a large aperture telescope to collect ...
0
votes
1answer
56 views

Mechanism of reaction of benzenediazonium chloride with ethanol to form benzene and acetaldehyde

In my textbook, all that was told was that ethanol is a mild reducing agent and hence reduces BDC while oxidising itself. Is there any mechanism or am I just supposed to remember this like a redox ...
-1
votes
1answer
26 views

Do any of the geometry names(VSEPR) change if you use a double or triple bond instead of single bonds?

so I'm studying chemistry and wondering the following "do any of the geometry names in VSEPR like linear, trigonal planar, square planar, etc. change if you use a double or triple bond instead of ...
-1
votes
0answers
25 views

Finding volume of carbon dioxide produced in combustion of methanol [closed]

The reaction for the combustion of methanol ($\ce{CH3OH}$) is seen below. If $\pu{1.0 mol}$ of methanol is completely combusted, what volume of carbon dioxide is produced. Assume STP ($\pu{273.15 K}$, ...
-1
votes
0answers
17 views

Effect of pressure on barium oxide crystal [closed]

$\ce{BaO}$ has a rock salt type structure.When subjected to high pressure, the ratio of the coordination number of $\ce{Ba^2+}$ ion to $\ce{O^2-}$ ion changes to. a) $4:8$ b) $8:4$ c) $8:8$ d) $4:4$
-1
votes
0answers
10 views

Changing Viscosity of Silicone Oil

I am trying to get hold of silicone oil of $1$ or $1.5$ cSt for some experiments but struggling because they are volatile and so not easy to find. Is there some solvent which can be added to silicone ...

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