Hello all.
I am performing chemistry experiments and recording the times of various observed results. What I am doing currently is performing the test several times in order to determine what result is "normal."
My goal is to determine a range as a standard by which all future tests will...
IX Resin is a cool idea.
I don't suppose it's possible to do a "homemade" resin, so in that case from where would be a good place to purchase some that can exchange typical Na and Cl ions? (hopefully not to expensive!)
Thanks.
Hello all.
I'm tutoring a high school student and am having trouble with a seemingly simple science project that was assigned: How to remove table salt from water. Having graduated as a Chemical Engineer, I said distillation! But the problem statement says you can't be that boring. Then I said...
Hello all;
I'm doing work for my job, and I've forgotten my statistics =(.
I first want to know if what I'm trying to do is possible.
I want to create a linear regression of the form Y = a * x1 + b * x2 + c.
http://imgur.com/Q4vGP"
As you can see, there is space that is grayed...
bad.. BAD Dorumon! =P
sqrt(a + b) =/= a + sqrt(b)
You should have some trigonometric substitutions in your notes/textbook that involve cosine. Take a look at them, and see if they make the integrand a little nicer.
I'm not sure why you don't agree. I end up with the statement:
a X (b - c) = 0
And for that statement to hold, the following must necessarily be true:
b - c = 0
since we know that a is nonzero.
a is parallel to 2a, so taking the cross-product of two parallel vectors yields the...
Yes, that is a catch indeed.
The tube system will be a closed loop, and therefore the nitrogen or helium would act as diluents; reducing the performance of the cell.
FYI: The pressure build-up is very small, so that is not a concern. There is a gauge which reads from 0 to 5 psig, and the...
Here is the situation:
We are building a small model car (roughly 8 in wide by 18 in long) whereby hydrogen is produced in a chemical reaction, travels through some tubing to our fuel cells, which in turn powers the motor.
The issue lies in the start-up procedure; it is required to purge...
when you see a square root in your integrand, you will likely want to attempt trig substitution if there is no other obvious route.
There are 3 different trig substitutions possible based on the form under the root:
x = z * sin@
x = z * tan@
x = z * sec@
you should know which one to use based...
thanks for your replies.
I did some research on this topic myself and found out where some of my confusion lies.
on the site http://www.fuelcellknowledge.org/research_and_analysis/cell_performance/index.html", it does clearly say in the Gibbs and Nernst Potential document that the Nernst...
Hello, I'm doing work in Fuel Cells and am having difficulty with a simple issue; the Nernst Voltage (E) is greater than the Standard Potential (EO)
The only electrochemical reaction considered is H2 + 0.5O2 --> H2O
The Nernst equation for this reaction is
E = EO - (RT / 2F) ln (PH2O / (PH2...
Hello, I'm taking Physical Chemistry I in second year, and my prof does not have a required book for the course and everything will be based off his notes (which are very good by the way)
However, I would like a deeper understanding of the material, and the prof did recommend two books. What...