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chemstudent
Questions (27)
A sample of 1.00 mol H2O(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of
5 answers
8,123 views
The general formula for moment of inertia is:
I = Sigma mi * ri^2 (mi is mass of atom, ri is distance to axis of rotation) In a
4 answers
2,298 views
Calculate the entropy change in the surroundings when 1.00 mol N2O4(g) is formed from 2.00 mol NO2(g) under standard conditions
4 answers
5,054 views
I understand the basics of HBr/HI cleavage of ethers.
Ether: R-O-R' When both substituents are primary or secondary, cleavage
1 answer
402 views
Write balanced equations showing how HBr and SO2 are consumed in a gas trap containing NaOH.
4 answers
1,095 views
The question asks to determine the IUPAC name of a compound based on a diagram.
I would choose the name:
4 answers
628 views
What is the difference between these two compounds:
(Z)-5-Ethyl-2,4,6-trimethyl-2,4-octadiene
2 answers
568 views
Which mechanism can better account for the product mixture obtained from the dehydration of cis and trans 4-methyl-cyclohexanol:
3 answers
825 views
Show the mechanism that illustrates the following reaction.
1-methyl-1-methanol-cyclopentane + acid -> 1-methyl-cyclohexene So,
2 answers
1,092 views
isopentyl alcohol is reacted with acetic acid to make isopentyl acetate through Fischer esterification. Sulfuric acid is used to
4 answers
859 views
I'm working with a reaction of the form:
A + B -> C Problem: IF the equilibrium constant is 4.2 and an equimolar mixture of A + B
7 answers
664 views
Why is rubbing alcohol poisonous?
Some rubbing alcohols are made from isopropyl alcohol which you clearly can't drink, but most
3 answers
781 views
Why is "phenyl" the name for the substituent variant of a benzene ring and "benzyl" refers to something slightly different
1 answer
377 views
Solid NaI is slowly added to a solution that is .010M in Cu+ and .010M in Ag+...
a.) which compound will precipitate first b.)
4 answers
4,426 views
A quantitative amino acid analysis reveals that bovine serum albumin (BSA) contains 0.58% tryptophan (Mr 204) by weight.
A)
5 answers
4,886 views
Is this the wrong forum for these type of questions or can I improve the way I'm asking. If so, let me know. Thanks :)
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2 answers
694 views
I'm looking at a protein in a 3D visualization program (PyMol). I have the full amino acid sequence list.
How do I determine
1 answer
470 views
What is the difference between acyl, acetyl, and enoyl?
3 answers
492 views
A sample of an ideal gas consists of 2 moles, pressure = 1 atm, volume = 0.5 liters
Find the temperature pV=nRT T = p*V/(n*R) T =
2 answers
586 views
I love this jiskha service so far. It's been extremely helpful, however I was wondering if there were pay services that offered
1 answer
474 views
What is the temperature of a two-level system of energy separation equivalent to 300 cm^−1 when the population of the upper
6 answers
3,620 views
why is fe 2+ a better reducing agent then mn2+. ( I thought since mn2+ had a higher Eox it would be better)
2 answers
566 views
What is the net ionic equation including phases for NiPO4(s) dissolving in H3O^+(aq) ?
2 answers
530 views
Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the
3 answers
494 views
Redox Titrations:
a. write 2-3 sentences describing and identifying the type of chemical reaction that occurs when Fe2+ reacts
7 answers
1,603 views
If a solid is soft and white and melts at 75 celsius but does not conduct electricity in solution, which type of solid would it
4 answers
509 views
Write 2-3 sentences describing and identifying the type of chemical reaction that occurs when Fe2+ reacts with potassium
4 answers
688 views
Answers (22)
also, for the net ionic equation, you write MnO4 but it should be KMnO4?
Ok so how would I find the reduction potential for KMnO4?
I didn't see the answer you gave me yesterday?
Yes it was a fill in the blank. That's why I am confused because there are so many ways to go.
I need help, somebody understand this please!!
Those of you looking at this in the future don't forget the quadratic equation!!!
Perfect. I do remember reading that before. Thanks so much for the help!
GK, thank you so much. That was exactly what I was looking for!
The iron will lose this much energy upon cooling to 100C: .45 J*g^-1*K^-1 * 50g * 52K = 1170 J The water will gain this much energy when heating to 100C 4.21 J*g^-1*K^-1 * 20g * 11K = 926.2 J The difference in those energies will be used to vaporize water:
I already googled and read those exact pages before posting. Acyl and Acetyl look like the exact same thing yet they have completely different Wikipedia pages. I get the feeling that there is some difference that I am not seeing.
I'd say, the answer is the product of the first three prime numbers. 2*3*5=30
Each choice properly multiplies up to 1386, but D is the only choice that has all prime factors. 693, 231, and 33 aren't prime numbers since they can be factored further.
The problem I have with this is, that if I change the initial 1 concentration to something else, like 2 for example, then x/2 solves to a different yield % (71%). This leads me to believe that there is no constant yield percent for the given problem.
Thanks so much. I thought I was missing something, but you are right. Either I'm misreading the problem or it can't be solved from the information provided. I'll turn that in. Thanks!
Perfect. Thanks!
1-hexanal is redundant. In an aldehyde, the aldehyde carbon is always #1. After seeing DrBob's answer, I'd change the substituent orders in my answer to be alphabetic: 2-ethyl-3-hydroxyhexanal 2-ethyl-1-hydroxyhexan-3-one 2-ethyl-1-formylhexan-3-one
If primary alcohol is oxidized once, you get an aldehyde group (if oxidized twice you would get a carboxylic acid) 2-ethyl-3-hydroxyhexanal If secondary alcohol is oxidized, you get a ketone: 1-hydroxy-2-ethylhexan-3-one If both oxidize, you have a ketone
thanks!
nevermind. figured it out.
help? is this question poorly worded? Is there no clear answer? I transcribed from my assignment directly.
I was hoping you could envision the molecule given my estimated IUPAC name of: (Z)-5-ethyl-2,4,6-trimethyl-2,4-octadiene
(I think my tabs broke that post. retrying...) The question asks to determine the IUPAC name of a compound based on a diagram. I would choose the name: (Z)-5-ethyl-2,4,6-trimethyl-2,4-octadiene However, this doesn't match any of the given choices. They
