# All Questions

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### How much NO is emitted per day? [on hold]

A power generation station consumes 3.5 million liters of oil per day. The oil has an average composition of C18H32 and density 0.85 g/cm3, and the gas emitted from the exhaust stack of this plant ...
17 views

### Gallium makes aluminum soft like a wet tissue. Any other metals or alloys that are vulnerable to similar damage?

Gallium can make aluminum soft and brittle as long as it bypasses the aluminum oxide normally formed on the surface of the aluminum (for example by scratching the surface). Mercury can weaken ...
13 views

### How does air being saturated with water affect combustion reaction in coke oven

I am doing a question where A coke oven gas contains 40% CH4, 15% H2 and 45% CO. The feed air is saturated with water vapour at 80c. What is the volume of dry air required to completely burn 1m^3 (...
15 views

### Brown gunk forming at the bottom of an acetone bottle

A few years ago I bought a (plastic) bottle of acetone. I think it was about 0.75 - 1 L. I used very little of it, then I left it at the back of the bathroom cabinet, tightly closed. I basically ...
15 views

### what is processes used by 2-nitrophenol [on hold]

What are the specific processes used by 2-nitrophenol in the pharmaceutical industry, paints and pesticides?
19 views

### Is it possible for the kinetic energy integral to be negative?

Is it possible for the kinetic-energy integral, Tij, to be negative? I was messing around with some HF code and found that the integral became negative on some off-diagonal terms. (This could also be ...
32 views

### Amperage for electrolysis of water?

I am electrolysing water using several different potential catalysts for my eight grade science fair project. The electrolysis will be running at 2 to 2.5 volts over nickel electrodes, as I do not ...
24 views

### What type of reaction is this? [on hold]

1.AgO+HCl=AgCl+H2O Is this reaction possible? If it is possible ,would it be right to call it a precipitation reaction as well as a neutralization reaction? 2.Zn+CuSo4(aq)=ZnSO4+Cu Can this ...
11 views

### redox titration [on hold]

This was in a lab of a redox titration reaction of Iron(II) and permanganate...The questions are: 1) considering that fumarate ion can also be oxidized by permanganate, what problem might you ...
25 views

### Why does the reaction between 2‐methylbut‐3‐en‐2‐ol and hydrogen bromide show allylic shift?

In the following reaction shouldn't the minor product be the major one as the carbocation formed before attachment of bromine is 3°? Also, can someone tell me why the product includes only ...
27 views

### Tendency of alkali metals to release an electron

We know that the ionization enthalpy of alkali metals decreases down the group. So removing an electron must be easiest from Caesium. The Standard Reduction Potential of Lithium is the most negative ...
16 views

### Combustion problem, empirical and molecular problem set up? [on hold]

I have a problem setting up the overall problem below I know the answer to part A (C2H3O3 or tartaric acid). Whenever work it out I never get the correct formula. I'm not sure if I'm messing up on one ...
13 views

### What is the melting point of almond milk under normal conditions?

I have some almond milk and I saw it freeze. I suspect that it was able to freeze because the almonds dissolved in the water were an impurity, thus making the melting point higher. This almond milk ...
26 views

### Cupric and cuprous copper

Copper has two chlorides: $\ce{CuCl2}$ and $\ce{CuCl}.$ Copper reacts directly with chlorine to form a copper(II) chloride. Why doesn't it form copper(I) chloride? Is it because $\ce{CuCl2}$ is more ...
25 views

### Magnetic nature of tetraamminedichlorocobalt(III) chloride

I know how to predict magnetic nature when the compound contains only strong field or only weak field ligands. But in $\ce{[Co(NH3)4Cl2]Cl},$ $\ce{NH3}$ is a strong ligand whereas $\ce{Cl-}$ is a weak ...
15 views

### N-methylacrylamide (NMAM) vs N-isopropylacrylamide (NIPAM): expected difference in effects on water structure

The only difference between these two is the group attached to the Nitrogen: in NIPAM, it's isopropyl, while in NMAM it's methyl. In a study on aqueous NIPAM, it was shown that the isopropyl groups ...
167 views

### How to convert Mn2O3 to Mn3O4?

I was preparing $\ce{Mn3O4}$ but it was when characterized by XRD, a $\ce{Mn2O3}$ phase existed. Now how can I convert $\ce{Mn2O3}$ to $\ce{Mn3O4}$?
16 views

### Vapour pressure [duplicate]

I am confused. How does the change in volume of container affect the quantity of water, vapour and vapour pressure present in it(keeping the pressure of container constant)?
25 views

### List of Chemicals That React With Blood [on hold]

Title explains everything necessary.
20 views

### What is an example of an isopropyl alcohol resistant caulk?

What is a caulk (or bonding adhesive) that can be exposed permanently submerged in an isopropyl alcohol (>91%) bath? The idea came from this previous question: Silicone vs Alcohol It seems from one ...
17 views

### Homework Exercises - Liquid Solutions (General Chemistry) [on hold]

The total concentration of dissolved ions in seawater is about 1.1 M, but concentrations can vary depending on the exact location and conditions. What minimum pressure must be supplied to a reverse ...
19 views

### Electroplating copper to copper

The experiment involved using 0.1 M copper sulphate and two identical copper electrodes were used (they had different masses) however, it was found when the electrodes were positioned closer together ...
11 views

### What are the factors on which the activity constant mainly depend? [on hold]

Particularly the problem arises when we have to take ratios of activities to think about whether we can cancel the activity constant.Please answer this with close reference to things like solute,...
35 views

### Oxidation of fructose with conc. HNO3

I recently studied carbohydrates. I was taught that fructose on oxidation with strong oxidizing agents like concentrated $\ce{HNO3}$ yields glycolic acid and tartaric acid along with trihydroxy ...
31 views

### Hydrogen Bonding by Carbenes

A hydrogen bond is formed between hydrogen attached to highly electronegative atoms (nitrogen, oxygen, and fluorine) which are small in size too and the non-bonding pair of electrons of another such ...
35 views

### I conducted a neutralisation reaction at school and there was fizzing. How is this possible? [on hold]

The reaction was $$\ce{HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l) + Energy}$$
27 views

### What does “orthorhombic” actually mean?

I'm trying to understand what it means for a molecule to have orthorhombic symmetry. According to Di Lauro's "Rotational Structure in Molecular Infrared Spectra," a molecule is orthorhombic if the ...
26 views

### Why mustn't the sample be dipped in the mobile phase in paper chromatography?

As the title says it, I am curious about why the sample (ie, an extract of plant's chlorphyl transferred onto paper) must not be dipped into the mobile phase (ie, the solvent which goes up the paper)? ...
27 views

### Why does my artificial coffee prevent me from getting hungry? [on hold]

When I get up in the morning, I need to eat within 30 minutes or my blood sugar will get too low. I discovered that some awfully artificial stuff, which the manufacturer calls flavored coffee, ...
40 views

### Acid catalyzed dehydration of alcohols [on hold]

Is acid catalyzed dehydration of tertiary butyl alcohol faster than that of primary alcohol?
22 views

### Volatility comparison for isomers of phthalic acid

All the atoms of these compounds are in a plane. o-phthalic acid can show extensive intra-molecular hydrogen bonding as well as inter-molecular hydrogen bonding. m-phthalic acid can show intra-...
32 views

### Does space in between have any significance in IUPAC nomenclature?

The correct IUPAC name of the following compound is: (a) 2,4,6-trimethyl cyclohexanone (b) 1,3,5- trimethyl benzophenone (c) trimethylcyclobutanone (d) 2,4,6-trimethylcyclohexanone I ...
33 views

### What are the degrees of freedom in an ionic solid such as sodium azide?

Degrees of freedom describe the different ways atoms move in a sample. For a pure ideal gas made of non-linear molecules, there are 3N degrees of freedom (N is the number of atoms in the molecule), 3N-...
21 views

### Dipole moments of dibromoethene isomers

There was an exercise in my textbook asking to compare the dipole moments of 1,1-dibromoethene and 1,2-dibromoethene(Z). The answer in the textbook says that the dipole moment of 1,1-dibromoethene is ...
13 views

### Is coating titanium with PbO2 better alternative to the graphite substrate one?

I want a good anode for my chlorate cell. I tried coating graphite with PbO2 but without success. So I was wondering about using titanium as substrate. Is it better then graphite, also is it easier to ...
20 views

### Comparing the order of intermolecular forces [on hold]

Order of intermolecular forces: $$\ce{CO2} > \ce{CH4} > \ce{N2}$$ Here, van der Walls force increases with molecular size. Thought $\ce{CH4}$ is $16 \,\rm g$, it has stronger molecular force ...
20 views

### global and local reactivity parameters for open shell systems

Koopmans' theorem is a useful approach to calculate the global reactivity parameters from the HOMO-LUMO energies. My question is, does it apply to the open-shell systems where we get two sets of ...
29 views

### Finding the maximum mass of copper(II) nitrate that can be produced from a given mass of copper [on hold]

I have the following chemical equation: $$\ce{Cu(s) + 4 HNO3(aq) -> Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g)}$$ The mass of copper in the equation is 0.6355 g. I am trying to find the maximum mass of ...
20 views

### Any element do not form four covalent with other atom. Why? [on hold]

Any element do not form four covalent bond with other atom. Why? PLEASE GIVE ANSWER I AM STUDY IN 11 CLASS
22 views

### Separate less volatile component from distilling a mixture [on hold]

Is it a strict rule that when we boil a mixture of two liquids, with one being less volatile than the other, the more volatile vapour has to form the greater portion of the total vapours? If it is so,...
8 views

### How to confirm experimentally that a hemi-acetal compound has formed?

I have read that under mildly acidic or alkaline conditions alcohols can attack aldehydes/ketones to produce hemi-acetals. But the reaction is reversible, so the reactants and the hemia-cetal are in ...
5 views

### What is the potential of Zn- Hg electrode if 80% of zn-hg is in contact with zn2+ ions of 0.06 M concentration [on hold]

Effect of immersed surface area of the electrode on the potential
32 views

### How do I name a substituent which is a cycloalkane which is attached by a chain of more than one carbon?

Above is a picture of an alkane. How would I name this using IUPAC rules? I understand how to name other substituents such as (1,1-dimethylethyl) and some other methyl groups, but I don't know how to ...
14 views

### What makes a chemical reaction reversible? [on hold]

Is there a way to determine whether a chemical reaction will be reversible or not?
17 views

### Connolly surface for a deuterated/tritiated molecule [on hold]

peoPle did not liKe van der Waals and covalent radii for deuterium and tritium ("hardly worth pursuing" was one coMment) so perhaPs I sHould ask my aCtual quesTion instEad, I want to comPute the area &...
18 views

### Based on Molecular Orbital Theory , how is it decided that the double bond in O2 molecule has one sigma bond and one pi bond?

My Chemistry textbook says this in regard to a C2 molecule: It is important to note that double bond in C2 consists of both pi bonds because of the presence of four electrons in two pi ...
29 views

### Using a the particle in a box - one dimension, to calculate the zero point energy of an hydrogen atom

I have been tasked with using the one dimensional particle in a box model to calculate the zero point energy of an hydrogen atom with different sizes. Using the formula $E_1=h^2/(8mL^2)$ for a box ...
19 views

### Equation for predicting electron distance [on hold]

Say that I have a Hydrogen Atom. We know from the electron cloud model that the electron has a certain probability of being in a certain area, and I've always been told that this probability can be ...