-1
votes
0answers
7 views

What happens when you mix mustard and wine and what does it do to your stomach?

I am trying to prove a concept for a history class and I can't find anything that connects the two.
0
votes
0answers
9 views

Calculate the grams of the precipitate formed? Please explain how I do this

357 mL of the dilute solution is reacted with 223 mL of a 0.50 M solution of silver nitrate. Calculate the grams of the precipitate formed. (HINT: Stoichiometry & limiting reagent involved)
0
votes
0answers
8 views

how is calcium sulfate made?

I'm doing a chemistry project on ionic compounds found on food labels, and I can't find a clear article on how calcium sulfate is made for edible foods. I know it comes from calcium sulfate dihydrate. ...
-1
votes
0answers
8 views

What is the pressure of a gas in KPa if a gauge used to measure the pressure reads 700.0mmHg?

I would really appreciate help on this. I have no idea how to convert mmHg to Kpa What is the pressure of a gas in KPa if a gauge used to measure the pressure reads 700.0mmHg?
0
votes
0answers
4 views

Polymer : long limited branching/preferbly straight chained fluorinated acrylate/epoxy

I was wondering if there are any trifluoromethyl acrylate/epoxy with 15 carbon backbone or longer preferably with limited branching preferably straight chained commercially avaliable, preferably with ...
1
vote
1answer
20 views

Reaction of chlorine with hot/cold solution of hydroxide

When chlorine reacts with cold solution of say potasium hydroxide, the disproportionation goes to lower oxidation states: $\ce{Cl2 + 2 KOH -> KCl + KClO + H2O} $ Whilst with hot solution the ...
-1
votes
0answers
23 views

What are the materials required for the manufacture of glass [on hold]

I'm programer , i will to simulat a program for Glass industry . so what is the materials required for the manufacture of glass ? and what is the degree of melting ?? like the sand ....
0
votes
1answer
18 views

Will this series of reactions work to produce potassium phosphate?

I want to end up with a solution or anhydrous sample of potassium phosphate with which I can grow larger crystals. I want a challenge and something to do so I don't want to buy potassium phosphate, I ...
0
votes
0answers
19 views

What gives variations in the color of cadmium sulfide paint pigment?

Oil paint manufacturers sometimes make several "shades" of a color, all of which list the exact same chemical ingredient. For example, look at Gamblin's artist grade oils, in the yellow colors, ...
3
votes
1answer
27 views

Na2HPO4 is amphoteric: write the two reactions

$\ce{Na_2HPO_4}$ is amphoteric, which means it can act as a base or as a acid depending on which substance they react with. This is the reaction in which disodium phosphate appears to be an acid: ...
2
votes
1answer
54 views

Why are naturally occuring liquids more rare than solids and gasses on Earth? [on hold]

There are only a few naturally occurring liquids I can think of on earth, such as water, mercury and animal oils. Why are naturally occuring liquids more rare than solids and gasses on Earth? To be ...
-1
votes
0answers
35 views

A problem in ionic equilbrium

Question 1998(b) My attempt: I thought that $\ce{AgCl}$ would yield $\ce{Ag+}$ and $\ce{Cl-}$ ions, whose concentration can be found from $K_{sp}$ as $\sqrt{K_{sp}}$. This $\ce{Ag+}$ reacts with ...
0
votes
0answers
19 views

Substitution reaction(Sn2) [on hold]

Why do we need a strong lewis base for better Sn2 nucleophilic substitution and weak lewis base for Sn1 nucleophilic substitution ?
0
votes
0answers
12 views

How would you prepare 300.0 mL of a 0.250 mol/L $\ce{KH2PO4}$ solution? [on hold]

How would you prepare 300.0 mL of a 0.250 mol/L $\ce{KH2PO4}$ solution?
0
votes
0answers
28 views

Determining the name of a compound via IR and H NMR spectroscopy [on hold]

I know that the functional group of this compound is a carboxylic acid, but I can't seem to figure this out. It has a melting point of 105-110. Can someone please help me determine this compound's ...
2
votes
1answer
27 views

Stereoselectivity of hydroboration

The above compound undergoes hydroboration. I originally thought that the $\ce{OH}$ group can attach to any of the 2 carbons plus there are 2 possible enantiomers at each position. So there should ...
0
votes
0answers
15 views

Krown Rust Protection/RustCheck - Soluble in?

This is a very practical question in nature and not meant to need a tremendously technical explanation. As a little background, I work as a auto detailer and have yet to find something to easily ...
1
vote
1answer
11 views

Conductometric titration of Strong Acid And Strong base

Consider conductometric titration of Strong Acid with strong base say HCl + NaOH. My question is why initially the conductance decreases. If H+ of HCl is consumed by OH- of NaOH, forming water and ...
2
votes
1answer
32 views

Question about metastable radionuclide symbols

Does anyone know if there is an officially sanctioned way to typeset symbols like technetium-99m (99Tcm or 99mTc)? I have seen both, although in more recent publications, I think, the latter ...
2
votes
0answers
17 views

Application of limiting reagents and acid-base stoichiometry

I'm having a bit of trouble with the latter questions of this problem. 15.0mL of 1.4M $\ce{HCl}$ was mixed with 1.00g of $\ce{CaCO_3}$ until all the solid had dissolved. The solution was then ...
11
votes
1answer
568 views

Why is pyrimidine less basic than pyridine?

From Wikipedia's article on pyrimidine: Because of the decreased basicity compared to pyridine, electrophilic substitution of pyrimidine is less facile. But why is pyrimidine less basic than ...
0
votes
1answer
21 views

Possible E2 products of S-2-bromo-2-methyl-1-phenylbutane

I have been asked to predict wether the following reaction will proceed by elimination or substitution. $\hspace{2.4cm}$ I believe that the reaction would proceed by the $\mathrm{E2}$ mechanism. I ...
-2
votes
0answers
17 views

What is the structure of Tertbutyl phenyl ketone? [on hold]

I would like to know the chemical structure of the terbutyl phenyl ketone.
0
votes
0answers
19 views

Interstitial Alloys of 2 metals

Ok so I understand that there are substitutional alloys of 2 metals like with gold and silver and interstitial alloys which fit elements within the lattice structure of a metal like iron and carbon ...
0
votes
0answers
16 views

What high school and university courses should I take? [on hold]

To clarify my rather vague question, I am working on a fairly complex theory. This theory involves the properties of atoms, all elements and antimatter. I was wondering what specific courses or ...
1
vote
0answers
5 views

Effect of His-tag on enzyme activity

In my biochemistry laboratory class, I designed an experiment to study the effect of a His-tag on enzyme activity. First, I measured the activity of the His-tagged enzyme. Then, I cut off the His-tag ...
0
votes
0answers
16 views

why is the term enthalpy created? [on hold]

Giving heat to a system changes its intrernal energy.Then why is the term enthalpy created?Change in internal energy must be the total heat gained or lost then why in heat capacity at constant ...
1
vote
1answer
37 views

What will be the reaction between tin (II) chloride and copper (II) chloride?

I just tried conducting an experiment during lunch today. Now, I calculated this reaction 4 days ago dealing with electrochemistry, $$\ce{SnCl2 + CuCl2 -> Cu(s) + SnCl4}$$ Theoretically, I got ...
0
votes
0answers
19 views

Estimate specific heat capacity of liquid [on hold]

I am attempting to help a friend with thermodynamics homework, but I am unfamiliar with questions like this. I am given this question: A calorimeter of mass 90 g and specific heat capacity $420\ ...
0
votes
1answer
48 views

How should I construct the orbitals of dilithium using only pen and paper?

For a week I have lessons about quantum chemistry and I have a trouble understanding how to arrive at the good answer for the drawing of the orbital $(\ce{III})$ for $\ce{Li2}$ (see the second ...
0
votes
0answers
22 views

How do you determine the amount of peaks using percentages? [on hold]

Naturally occuring chlorine comprises 75.53% 35Cl and 24.47% 37Cl, while naturally occuring carbon comprises 98.89% 12C and 1.11% 13C. Mass spectrometry will give how many peaks for CCl4?
5
votes
0answers
45 views

How does spin flipping of triplet carbenes occur?

Below is presented a page from Clayden Organic Chemistry 2ed. How and why does the spin flipping during the collision with solvent molecules actually occur?
-3
votes
0answers
41 views

Which of the following will undergo fastest SN1 reaction?

Answer : M0re stable is the carbocation faster will be SN1 reaction so, according to me the first one is more stable due to resonance so the first one should undergo faster SN1 reaction than the ...
0
votes
0answers
21 views

Balance Redox Reactions [on hold]

I have to balance the following redox reaction: $$\ce{ Zn + NaNO3 + NaOH -> Na2ZnO2 + NH3 + H2O}$$ I tried to balance it using the acidic method and got: $$\ce{10H2O + 8Zn + 2NaNO3 -> 8NaZnO2 ...
0
votes
0answers
11 views

The potential range of the cyclic voltammetry of CoCat in KPi made of D2O

I have a phosphate buffer adjusted to pH 7, and another phosphate buffer made of deuterium oxide (D2O) adjusted to pH 6.6 (pD 7). I want to conduct cyclic voltammetry of cobalt oxide catalyst in these ...
1
vote
1answer
29 views

How to dissolve iron powder?

I know iron can react with many solutions, but when I tried to mix iron powder together with permanganate or dilute sulphuric acid, the iron powder would not react and instead, it just float on the ...
1
vote
3answers
22 views

w/w % to molarity

After reading a number of explanations about it after googling, I'm a bit confused on this. Some explanations are doing it using a solution density, others aren't, though most are. On one site it's ...
0
votes
0answers
43 views

Gibbs Free Energy and entropy of the universe

I'm having a little bit of trouble after putting alot of thought into the relationship between entropy of the universe and Gibbs Free Energy. Both are used to predict spontaneity, but from my ...
0
votes
2answers
26 views

Volume of gas given off RHS with volume of gas used in one part of LHS

So I have the following equation: $$\ce{2SO2 + O2 -> 2SO3}$$ and the question: 100cm^3 of sulphur dioxide is used, what volume of sulphur trioxide is given off? Can someone please explain how I ...
3
votes
1answer
55 views

Why is the lone pair of pyridine's nitrogen atom not part of the aromatic ring?

In pyrrole, the lone pair of electrons belonging to the nitrogen is part of the aromatic ring. However, in pyridine it is part of an sp2-hybridized orbital. Why can't it be in the p-orbital and take ...
2
votes
1answer
34 views

Why does this flame travel (in a circular path, multiple times)

We filled a graduated cylinder with Ever Clear and let it overflow. Then we lit the liquid on fire. To our surprise the flame started running around the base of the cylinder. Why does this happen? ...
1
vote
2answers
42 views

A problem from thermodynamics

I am trying to do the following problem: Freezing of water at $273~\mathrm K$ and $1~\mathrm{atm}$ Which of the following is true for the above thermodynamics process? p) $q=0$ q) ...
0
votes
0answers
15 views

Why do we use gold circuits instead of fiberoptics? [on hold]

Isn't gold more expensive? Doesn't fiber optic cable have lower latency?
2
votes
0answers
26 views

Compute minimum energy paths from arbitrary positions on the potential energy surface

The minimum energy path is a useful concept in understanding chemical reaction paths. As I understand it, such MEP's are most often computed to verify that a transition state structure connects two ...
0
votes
2answers
33 views

Acrylic container and electrolysis

Normally when you do electrolysis, you would use a glass container. Would it be wise to use a acrylic container? I have one spare but not sure if this would affect the electrolysis process. Is there ...
0
votes
0answers
35 views

Which substituent in the benzene ring activates it most towards electrophilic substitution?

I came across the following question in my textbook: Which of the following gives electrophilic substitution reactions most easily? Phenol Chlorobenzene Benzene Methylbenzene I tried drawing ...
0
votes
0answers
15 views

Is Bohr-bury scheme correct? [on hold]

According to Bohr-Bury rule 4s orbital has lesser energy than 3d orbital . But 4s es taken as a valence shell. So since it is the outermost shell and the farthest from nucleus it should have the most ...
-3
votes
0answers
22 views

Reactivity of halogens [on hold]

How does the bond strength of H-Halogen effect the reactivity of halogens with hydrogen? The H-Halogen bond strength decreases down the group. But how is this affecting anything? I mean I know the ...
5
votes
1answer
51 views

What causes metallic objects to ring?

If I use a iron rod to hit a 3" × 12" iron plate there is the distinct sound of a metallic ring. What is the cause of this distinct sound? Is it the crystal structure of iron or that iron is a ...
0
votes
0answers
15 views

Removing cleaning fumes [on hold]

for the past few weeks I've been suffering a headache and smelling a strong stinging smell (like spilt old perfume) it started after cleaning my bedroom carpet is there a way to clear the air of the ...

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