# All Questions

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18 views

### How to determine N-terminus and C-terminus of a protein

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 ...
23 views

### Chem 101 Molarity/Mass conversion

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 ...
13 views

### How does the stability of Group I and Group II carbonates change as you descend the groups?

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 ...
19 views

### Diamagnetic vs Paramagnetic

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 ...
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41 views

### Is carbon dioxide soluble in petroleum ether, and why?

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 ...
25 views

### Vinegar salt reaction to produce acid; does it matter what type of vinegar I use

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; ...
35 views

### Metal nail reaction in wall filler

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 ...
5 views

### Calculate protein concentration based on Lowry assay [on hold]

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 ...
10 views

### SN2 reaction on a chiral carbon atom [on hold]

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
16 views

### What is the N factor of sulphur trioxide and sulphur dioxide in various reactions

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 ...
19 views

### When alcohol is used to sterilize, what about it changes that it can't be re-used? [on hold]

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 ...
34 views

### What is $\ce{NHO3}$? [on hold]

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?
130 views

### Does CO2 form carbonic acid in the atmosphere?

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 ...
16 views

### Making Lyophilized Cake Lookalike using household ingredients

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 ...
17 views

### styrene confusion

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 ...
27 views

### What will be produced when sucrose and potassium bitartrate react with each other?

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?
18 views

### Is there a molecule in which the central atom makes 8 bonds and has an hybridization of sp3d? [on hold]

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 ...