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calculating
Legal highs Research Chemicals forum
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calculating
Legal highs Research Chemicals forum
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calculating
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Author:
Rosemary
- Replies:
1
- Views: 187
Calculating RRKM Rate Constants from Vibrational Frequencies and Their Dynamic Interp
[color=#555555][font=Arial,]ABSTRACT: Rice–Rampsberger–Kassel–Marcus (RRKM) theory calculates an energy-dependent microcanonical unimolecular rate constant for a chemical reaction from a sum and density of vibrational quantum states. This article demonstrates how to program the Beyer–Swinehart direct count of the sum and density of states for harmonic oscillators, as well as the Stein–Rabinovitch extension for anharmonic oscillators. Microcanonical rate constants are calculated for the decomposi
Author:
Henry
- Replies:
1
- Views: 133
Calculating When Benzodiazepine Withdrawals Begin & Peak
Hi all,
I just thought I'd make a thread regarding withdrawls from Benzodiazepines and when the acute withdrawal typically begins and how long it usually lasts for. This is partly to create knowledge base for those wishing to withdraw, and also because a friend of mine has got himself in a bit of a pickle with Diclazepam usage and I'm hoping to help him out so any input would be hugely appreciative, thanks
[size=medium]I'm hoping some of you wil
Author:
Liam
- Replies:
0
- Views: 86
Calculating simple ratios
We're using 40 mL of Caprolactone in our lab tomorrow. The ratio is Caprolactone : Sn(Oct)2 : 1-octanol
The possibilities for assigned ratios are 100:1:1; 300:1:1; or 600:1:1
So in all 3 cases, we will use 40 mL of Caprolactone. How do I calculate the volume of the other 2 reactants, depending on each ratio?
[size=medium]ANSWER: "Multiply the volume of caprolactone by its density and divide by its molar mass. That gives you t
Author:
Mason
- Replies:
0
- Views: 118
Calculating Limiting Reagents with 3 Reactants
Hi everyone!
I'm working through two questions about limiting reagents, and I got the first, but the second is really confusing as it deals with 3 reactants, where my teacher only showed us how to solve with 2. Could anyone shed some light on this process? I have included the first question too so you guys can see my process!
Use mole ratios to identify the limiting reagent in the following reactions:
[size=medium]a) 2.75 mol
Author:
Jacob
- Replies:
0
- Views: 183
Calculating the EMF of cell
Problem:
In two vessels each containing 500mL of water, 0.5 mmol of aniline (Kb=10-9) and 25 mmol of HCl are added separately. Two hydrogen electrodes are constructed using these solutions. Calculate the emf of cell made by connecting them appropriately.
(mmol = milli moles)
Attempt:
[size=medium]This is basically a concentration cell. Since the electrodes are connected properly, I need not worry about whic
Author:
Johny
- Replies:
0
- Views: 110
Calculating Root Mean Squared
Hi,
A question has asked me to calculate the Root Mean Squared speed of Ammonia gas at 299 Kelvin.
The answer to that question is in the picture attached.
I have no idea why the Molar Mass has been multiplied by 10^-3.
Author:
Ashllle
- Replies:
0
- Views: 127
Calculating the Wavelength of a Photon Emitted in a Transition
I'm having trouble figuring this question out... I know that if I was dealing with hydrogen I would use the Rydberg constant and it would be smooth sailing, but I can't seem to find anyone online explaining how to solve this type of question when you are given energy differences between states and the atom is not hydrogen.
Any help is greatly appreciated.
[size=medium]The energy difference between n=2 and n=3 for an atom is 3.00x10-19 J and the ene
Author:
Makayle
- Replies:
0
- Views: 116
Calculating values of Ka, Kb, and Kw
This is a question from my discussion packet that I've been struggling with.
0.5 M solution of NaD (D- is a salt of the weak acid HD with the Ka=2.5x10^-10).
a. Based on the information given do you have a reaction of acid with water or base with water? Why?
Write down the chemical reaction:
What is the equilibrium expression?(Is that a Ka, Kb, or neither?)
[size=medium]Calculate t
Author:
Elijahf
- Replies:
0
- Views: 113
Calculating the heat absorbed by the solution
When 1.500 g of solid potassium hydroxide is added to 25.00 mL of 2.010M hydrobromic acid at 22.5°C in a coffee-cup calorimeter, the temperature of the resulting solutions is measured and recorded for 180 s. The density of the hydrobromic acid is 1.159 g/mL, and the specific heat of the solution is 3.70 J/g·°C. Calculate the heat absorbed by the solution.
My attempt: q soln = (3.70J/g°C) {(25.00 mL HBr) (1.159g/ml) + 1.500 KOH) (22.5°C)
[size=medi
Author:
Brookly
- Replies:
0
- Views: 115
Calculating moles of titratable acidic protons..
Hi, this is a question on one of my lab reports and was just wondering if i get could get some insight into how i would work this out please.
Background: Synthesized a solid acid, diluted 3.00g of solid acid up to 100ml with distilled water.. titrated with 0.1M NaOH in 30ml aliquots.
Titre average = 11.2ml
Formula in title = H4SiW12O40
Question:
[size=medium]Assuming the formula
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