# All Questions

29,973 questions
2 views

### sodium gluconate + sodium bicarbonate =?

Can you complete the chemical equation: Sodium gluconate + sodium bicarbonate --> Does potassium bicarbonate yield the same results?
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### Why aspirin dose is reduced in gastric achlorydia?

Aspirin remains in unionised form in acidic $pH$ but this unionised form is a diffusible form which is helpful in absorption across lipid membrane. My reasoning almost tries to contradict the ...
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### I need to identify the peaks in this boron mass spectrum

As part of a bigger project we were given this image. Its a mass spectrum produced in an accelerator with a Boron cathode. It was implanted in diamond. I assume the first peak is just $B^-$ but I have ...
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### One requires 0.01 mole of Na2CO3. Mass of Na2CO3. 10H2O to be taken is? [on hold]

One requires 0.01mole Na2CO3. Mass of Na2CO3 to be taken is.?
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### Chemical equation for oxidation of primary alcohol with acidified potassium permanganate

I have seen many sources describing the oxidation of alcohols with dichromate in great details; however, none or few gives a satisfactory description and explanation of the oxidation with acidified ...
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### Does N-linked glycoslation inhibition increase or decrease par-2 recepto aar activity

Hello guys I need some clarification, i know that melanosome transfer to keratinocytes is regulated in part by par-2, and this receptor is activated by trypsin, sligrl and to a lesser degree tryptase. ...
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### The roasting of 100g of Copper ore yielded 71.8g pure copper. The ore is composed of of Cu2S and CuS, with 4.5% inert impurity

Can anybody help me in calculating the percentage of $\ce{Cu2S}$ and Cu in the ore? I tried using basic mole concept but I must have made a lot of mistakes, because I got my answer as 125% (of Cu2S). ...
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### Can air conditioning cause urin smell?

On rainy days there is a strong urin smell on trains in Tokyo. I suspect this smell comes from ammonia. On Wikipedia I read: Ammonia and ammonium salts are also found in small quantities in ...
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### What happens to the carbon in carbon steel when it rusts?

Carbon steel is iron containing some carbon in various forms of iron carbide. When it rusts (oxidises), the iron becomes part of all kinds of crystalline and amorphous iron oxides and hydroxides, ...
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### What are the scientific methods for water quality measurements

I'm looking for the scientific methods for water quality tests. Unfortunately, the labs are not really specific what there are really doing. And I'm looking for the full spectrum of tests; metallic, ...
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### Positive or negative error using FAAS

if we want to determine the quantity of zinc in an insulin formulation, we make standard solutions for the measurements and we also have the physical samples. In standard solutions it contains water, ...
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### How do you use water as fuel for a generator

I have a school group project to do and we want to be able to power an engine or a generator with water. We have some research and information on the project but we feel like theres some details that ...
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### What do GGN, AAP, TCN, CAP, CCN, TGQ, etc. mean in DNA analysis?

What do the letters Y, Q, P and N mean in three-letter combinations involving DNA and/or RNA? I know, of course, about the bases A, C, G, T and U but..... Especially in articles (and forensic tv ...
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### Acid/Base Indicator

I'm not sure how the concept and math work on this problem. Can someone show me how you can get the answer, both conceptually and using math?
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### Regarding deuterium isotopic effect on solvooysis

Does solvolysis possible on unsaturated compound? If yes then how can we explain the following Kh/Kd data.
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Are there any soluble compounds capable of absorbing radio-frequency or long microwave radio-frequency electromagnetic radiation? I have noted that metals are often used to absorb these signals, but ...
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### Why isn't the base reformed in base-catalyzed hydrolysis of esters?

In acid-catalyzed hydrolysis, the hydronium ion is clearly reformed; however, in the base-catalyzed hydrolysis, an alcohol is formed as a by-product, but the strong base isn't reformed. Is it a ...
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### 5-MeO from Melatonin in the body? [on hold]

I am looking for true information about this video. The man in the video says that 5-MeO is synthesised from Melatonin in the human body. He also says that spending a week in a dark room will ...
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### percentage composition of a mixture [on hold]

A sample containing only $\ce{CaCO3}$ and $\ce{MgCO3}$ is ignited to $\ce{CaO}$ and $\ce{MgO}$. The mixture of oxides produced weight exactly half as much as the original sample. Calculate the ...
38 views

### Reduction of ester in presence of ketone group

As there is no ring expansion I'm assuming that a carbocation should not form at ester carbon as it leads to ring expansion. But is there any an exception to it? Also the hint provided along with this ...
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### How can you distinguish between 1°, 2° and 3° alcohol by the means of turbidity? [on hold]

How can we distinguish between 1°, 2° and 3° alcohol by the means of turbidity ?
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### Why aren't we zapped on touching a magnet? [on hold]

We were told that the cause for magnetism is the motion of electrons on an atomic scale which create magnetic fields. However I also know that moving charges produce electric currents. So my ...
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### Why is there a z² label for d orbitals, but no x² and y² labels with corresponding shapes?

I know that the $\mathrm{d}_{z^2}$ orbitals are named as a result from the conversion of the angular component of the hydrogen-like wave function in terms of Cartesian coordinates, but how come we ...
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### Sulfuric Acid danger [on hold]

I have access to a large quantity of salvaged timber which was used in an industrial process of paint (yellow) production. The wood was arranged vertically in barrel staves approximately 25’ long ...
21 views

### Calculating the pH of Strong Acid Solutions

Calculate the $\mathrm{pH}$ of a $\pu{1.5e–11 M}$ solution of $\ce{HCl}.$ How is the $\mathrm{pH}~7?$
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### Dissolving salt in alcohol

Can salt get dissolved in isopropyl alcohol, In order to make the liquid dry out faster and make some quick salt crystals?
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### Why there is no angle change observed in boron trifluoride (due to back bonding)?

Could anyone explain me why there is no angle change in $\ce{BF3}$ because of back bonding like in substances $\ce{H3BO3},$ $\ce{N(GeH3)3}$ etc.?
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### Measurement of concentration during a given reaction to determine rate laws [on hold]

The constant measurement of concentration is required to find the rate law of a certain reaction. In an integrated rate law, concentrations are measured as a function of time. How do you measure the ...
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### NH3 and PH3 differ from each other in their reaction with CuSO4 or AgNO3. why?

although nitrogen and phosphorus belongs to the same family, yet $\ce{NH3}$ and $\ce{PH3}$ differ from each other in their reaction with $\ce{CuSO4}$ or $\ce{AgNO3}$. $\ce{PH3}$ acts as reducing agent ...
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### How many dipeptides are possible by the reaction of glycine and alanine?

How many dipeptides are possible by the reaction of glycine and alanine? Glycine has no chiral centre. Alanine has one chiral centre. The products are alanylglycine and glycinylalanine (I not sure ...