All Questions

If one takes away the “$\ce{NH2}$” and “$\ce{COOH}$” on the image given, how would someone be able to determine which side is the N-terminus and which is the C-terminus with only the amino acid groups ...

A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.116 M and a total blood volume of 4.9 L. What mass of sodium chloride would need to be added to the blood to bring ...

I thought that as you descend both the groups, the carbonates get more stable. Is this because of the ions decreasing in charge density down the groups (so less distortion for the carbonate ion) so ...

As far as I know, to know whether a substance is paramagnetic or diamagnetic, we check if that particular species has got unpaired electron or not. But my textbook lists- Examples of Diamagnetic ...

The vapor pressure of zinc varies with temperature as $$\log P(\pu{mm Hg}) = -6850/T - 0.755\log T + 11.24 \label{eqn:1}\tag{1}$$ and that of liquid zinc as $$\log P(\pu{mm Hg}) = -6620/...

If the lemon juice used has 0.121 mol of total acid per 100. mL of juice, what volume (in mL) of 0.0998 M NaOH would you use to reach the endpoint of the titration?

From Castellan's Physical Chemistry, chapter 12 [1, p. 276]: 12.18 At $\pu{25 °C}$ we have for rhombic sulfur: $ΔG_\mathrm{f}^\circ = 0,$ $ΔS^\circ = \pu{31.88 ± 0.17 J K-1 mol-1};$ and for ...

The iron present in a $\pu{0.6656 g}$ sample of a mineral was reduced quantitatively to the $\ce{Fe^2+}$ state and subsequently titrated with $\pu{26.75 mL}$ of $\ce{K2Cr2O7}$. Calculate the ...

While drawing resonance structure of dibasic or tribasic acid, e.g. should I take out two $\ce{H+}$ (in dibasic) or three $\ce{H+}$ (in tribasic) together or one by while drawing resonance structure? ...

Which of the following postulates regarding the photoelectric effect is considered to be INCORRECT according to the quantum mechanical model we currently understand? (A) Increasing the intensity ...

& is there a trend? (I know that the solubility of the hydroxides and carbonates increase down Group 1, because they have a single charge(?))

I'm trying to investigate the change in iron in an avocado as it ripens. I'm planning on using redox titration but still a bit unsure of how to carry out the investigation (method). Do you have any ...

For the following compound, find Total number of stereoisomers Number of optically active stereoisomers Total number of fractions on fractional distillation of all stereoisomers ...

We did an experiment on neutralization of acids where we used 50% g/ml of NaOH to neutralize 0.5 M of acetic acid. I got the heat of neutralization to be -27.441 kJ/mol and theoretically it's 55.43 kJ/...

This is the Practices I use: Iron ii chloride was converted to hydroxide by adding NaOH, and then I added acetic acid to give the Fe 2 O 3 compound (with strong stirring and a temperature of 80-100 ° ...

Some supplement companies are putting a combinations of nicotinamide riboside and pterostilbene into the same capsule. Considering the stomach acid, water, body temperature, etc. I am wondering if ...

Has anyone seen a comparative list of typical run times of the techniques used in analytical chemistry? I am making a list of rough timescales of analytical techniques (for a slide). For example: ...

Calculate the final temperature of 34 mL of ethanol initially at 20 ∘C upon absorption of 617 J of heat. (density of ethanol =0.789 g/mL) answer in two sig fig

As part of an experiment, I need to immerse a piece of ZnSe crystal into a glass that contains a solution of water and carboxylate microspheres. I just want to make sure that the carboxylate will not ...

I know that there are polar uncharged amino acids (serine, threonine, asparagine, glutamine, cysteine) and polar charged amino acids (the basic and acidic amino acids). Does the charge on the acidic ...

I prepared 4 standards of increasing concentration. After they were measured, I plotted the absorbance vs the ppm. If I want to determine how far off the actual concentrations are from the expected ...

If you were doing a coulometric acid titration and the electrodes were ONE beaker without a salt bridge, what would the problem be if both of the electrodes in the beaker were graphite?

Does anyone have at least rough idea of the resistivity or conductivity of molten lithium carbonate?

Okay, let me ask this one more time. I have some almond milk and I saw it freeze partly in the refrigerator I suspect that it was able to freeze because the almonds dissolved in the water were an ...

My textbook (Chemistry the Central Science, edition 12, Brown et al.) says that effective nuclear charge increases down a column. Indeed, this is consistent with the values provided by Clementi in the ...

There's something about Chemistry that I need to clear up. Naming compounds. So I heard that there are different ways to name a compound depending on what it is. But I can't keep track of it all! ...

In 1st year chemistry questions, the concept of acid strength is often introduced to students including the 3 factors that provide a heuristic explanation for most of the common acids and conjugate ...

Hi please guys help me answer this query

Explain this Acidic Strength order H2SO4>HCl>HNO3 in acetic acid ? My Attempt Stability of Conjugate base is proportional to the acidic strength of Acids in acetic acid. 1)SO4- is having 2 ...

1,4-Dichloro-2,5-dimethylbenzene is symmetric about the plane of paper. I have never seen a plane of symmetry positioned like this. Would it be correct to call it a plane of symmetry?

We have all learnt different chemical theories (bohr model, quantum model etc) with the new theory being more correct than the previous ones. Suppose I do research in biology, how would I choose the ...

We conducted an experiment involving Lugol's iodine where if a substance contained a lipid it would form concentrated areas of color on the sides of the test tube. On many occasions, the test would ...

In the 4B group as we go down the group the stability of +5 oxidation state increases. Shouldn't it decrease due to inert pair effect?

Why are hydroxide Ions discharged when halide ions aren’t present in aqueous solution during electrolysis

I understand that the functional group $\ce{-F}$ is an electron-withdrawing group. It is expected that the difficulties of an electrophile to attack the carbon atoms are $$\ce{PhH}<\ce{2,4of PhF}&...

I googled it, and I'm finding some forum posts that say no, but no authoritative reference. CO2 is somewhat soluble in water (1.7 g/L at 20°C) and I understand that it's mostly NOT because it forms ...

I am trying to get get hydrogen chloride gas by using the reaction sodium chloride + vinegar = HCl(g) + sodium acetate, does it matter what type of vinegar I use eg apple cider vinegar, malt vinegar; ...

Please help explain what is happening to this nail. It has been in this wall filler for a good few months. The substance being excreted was rising up forming these stalagmites, with a liquid forming ...

Calculate the UNKNOWN protein concentration based on Lowry assay method. A standard curve was plotted and the amount of protein added in the unknown protein concentration was calculated based on abs ...

What would the mechanism for the treatment of a chiral carbon atom in an SN2 reaction be like. And can you please explain SN2 reaction briefly Thank you

As such i got my concept clear in case of redox reactions , but i fail to find n factor for non redox reaction specifiallyin case of $\ce{SO2 ,SO3}$ , where i used the total.+ charge or total - chrge ...

I read online that when you use regular household rubbing alcohol to soak something for sterilization purposes, you're then supposed to toss it out. I'm just curious why. Like, as long as there's a ...

Are $\ce{HNO3}$ and $\ce{NHO3}$ the same compounds? If not, what are the differences between them? If so, is one order preferred over the other? Are both acceptable?

Since when $\ce{CO2}$ goes into water it makes carbonic acid, then what happens when it rains? Some of the $\ce{CO2}$ in the air joins the rain drop as it falls and while the rain drop falls and ...

I'm working on a machine learning model to identify flaws in vaccines in lyophilized cake form. To train the model, I need a number of samples that look something like this: I have vials, but I'm ...

I am studying NMR and while looking at styrene, I can't figure out why the two hydrogens on the terminal double bond are not equivalent. Is it because one is closer to the ring in position than the ...

What would happen if sugar and cream of tartar react with each other? Would it create an ester? $$\ce{KC4H5O6 + C12H22O11 -> KC16H21O14 + 3H2O}$$ Is this correct? If not, why?

Doesnt matter what the molecule is, but the central atom has to be sp3d and make 8 bonds

Hydrazine $\ce{N2H4}$ and dinitrogen tetroxide $\ce{N2O4}$ form a hypergolic fuel and oxidizer pair widely used in spacecraft including Akatsuki. Wikipedia states: Hydrazine can be monoprotonated ...

There are many websites which states that pure liquids and solids have a concentration equal to one, but for some equations they are not! How do you explain the difference for this equation? For the ...