# All Questions

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### Density and partial pressure

A sample of $\ce{NOBr}$ gas was placed in a rigid flask where it decomposes at $\pu{25 ^\circ C}$ according to the following reaction: $$\ce{2NOBr(g) <=> 2NO(g) + Br2(g)}$$ At equilibrium, the ...
0answers
18 views

### Which of the following is chiral as well as dissymmetric

In an examination, I came across a question, 'which of the following is chiral as well as dissymmetric'. There were four options, and among them, two were achiral, and had improper axis of symmetry. ...
0answers
16 views

### Why do alkenes (olefins) burn hotter than alkanes (paraffins), even though alkanes are denser and more hydrogen-rich?

Burning hydrogen releases more total energy than combusting carbon, and all alkanes are denser as well, so why are flame temperatures for alkene molecules higher than their equivalent alkanes? P.S.: ...
1answer
33 views

### Molar mass question

Molar mass of oxygen is 16g/mol , but O2 is 32g/mol , it is shows that 32 gram per 1 mol ,but if we add 1 mol oxygen and one mol of oxygen , shouldn't it be 32 gram per 2 mol for dioxygen ? it doesn't ...
0answers
21 views

### Why does P vs V graph obtained by Boyle deviate from the real gas [duplicate]

My book contains the following graph. My book says - "Deviation from ideal behaviour also becomes apparent when pressure vs volume plot is drawn. The pressure us volume plot of experimental data (...
0answers
20 views

### Rate equation derivation for photocatalytic h2 producing reaction [closed]

I have a photocatalytic H2 producing reaction where methanol and water is reacted with sunlight and catalyst to give H2. when I develop rate equation I take water concentration as 1. Is it correct and ...
0answers
18 views

### How do I model drug diffusion from polymeric matrix?

My problem consists of a structure (say a cylinder) made from a homogenous distribution of a drug from a polymeric matrix. These compounds are mixed homogeneously in different concentrations (10% drug ...
0answers
20 views

### baking soda + skin => soap? [closed]

From here https://www.sumnerhealthcentre.com/site/drug-free/soap Soap is very good at what it does - removing oily residue from the skin. It is very difficult to remove motor oil or any greasy ...
1answer
212 views

### Why does polymerisation of n glycine molecules give n water molecules?

Referring to this webpage, Condensation polymerisation of glycine A simple counting argument would tell us that: 2 glycine molecules react, releasing 1 water molecule 3 glycine molecules react, ...
0answers
25 views

### how come Oxygen on the 2nd structure won't have +1 charge [closed]

how come Oxygen on the 2nd structure won't have +1 charge because if you use formal charge formula it 6-5 = +1
1answer
57 views

### What is the difference between structure and morphology in polymer blends?

When talking about polymer blends there is a difference between its structure and morphology, but I am not sure what it is. These two terms are used interchangeably in materials I use to study, but I ...
0answers
33 views

### what is the procedure for preparing the sample 3-(2-furyl) propionic acid? [closed]

vibrational analysis of the sample for this project work, iam analyzing the vibrational modes of this sample using raman spectrometer. so i need to know how to prepare this sample
2answers
72 views

### Identifying radial probability distribution curve given $n$ and $l$ value

The correct radial probability distribution curve for the hydrogen atomic orbital with principal quantum number,$n = 3$ and azimuthal quantum number, $l = 1$ is: ($4πr^2ψ^2$= radial probability ...
0answers
13 views

### Find no. of molecule of NaCl in Acid-base Reaction? [closed]

Na2CO3(a.q) + 2HCL(a.q) --> 2NaCl(a.q) + CO2(a.g) + H2O(l) If this reaction is carried out by mixing 2.12g of ...
0answers
24 views

### Hydroboration-Oxidation of Alkynes to form Ketones [closed]

Hydroboration-Oxidation adds a hydroxyl group to alkynes to forn enol. The enol tautomerises to form aldehyde or ketone. In case of non-terminal alkynes, two ketones are formed. Here is the example ...
0answers
46 views

### Why do lead acid batteries corrode? [closed]

As far as I know, an increase in temperature speeds up the cell chemical reaction, which speeds up the electrolyte evaporation, which increases the release of hydrogen gas, and hydrogen is the ...
0answers
42 views

### Good sample references for TGA, DSC and DTA thermal analysis

I am trying to estimate kinetic parameters for my liquid decomposition using thermal analysis. After doing a literature survey, I have decided to use the following - thermogravimetry (TGA) ...
2answers
31 views

### Change in entropy in reversible and irreversible processes

The change in entropy for a reversible process is given as- $\Delta$S = $\frac{q_{rev}}{T}$ Where qrev is the heat supplied isothermally and reversibly. The change in entropy for a irreversible ...
1answer
19 views

### Expansion of a gas under isothermal and reversible conditions

What is the reason for the statement - "When the expansion of an ideal gas is carried out under isothermal and reversible conditions, the internal energy does not change, i.e., $\Delta$U=0?" ...
1answer
72 views

### Why is the term “nascent nitrogen” still used in metallurgical industries?

Continuation of Why do nitrogen-containing organic compounds give N2 as the combustion product? (comment converted into question) Nascent state is an obsolete theory in chemistry and is discredited. ...
0answers
40 views

### Which oxygen in ester group is more nucleophilic?

According to my understanding, the filled orbital (lone pair electron for this) is more nucleophilic (higher energy) if: it has more $\mathrm p$ character (since p orbital is the furthest from the ...
1answer
47 views

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### Corrosive potential of molten ionic salt

I was looking at this video about fourth generation of nuclear reactors and one of developing concepts is molten salt reactor (MSR) where melted ionic salt replaces water as coolant and also acts as a ...

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