Homework Statement
When 5.00 g of NaOH(s) are added to 100 g of water using a calorimeter (with Cp = 493.24 J/K), the temperature rises from 25.0 to 37.5 °C. Calculate the molar heat of solution.
NaOH(s)--->Na(aq)+OH(aq)
Assume that the specific heat capacity of water is 4.18 J/gK and that...
Homework Statement
Use integration by parts to evaluate the integral:
∫ 1 ÷ (16 + x2) dx
Homework Equations
∫ u dv = uv - ∫ v u' du
The Attempt at a Solution
That's the problem, I don't know how to start. How would I divide up 1/(16 + x2) into two? So there would be a value for u...
Here is what I have:
BrO_{3}^{-} + NH_{3}OH^{+} + H_{2}O --> Br^{-} + NO_{3}^{-} + 2H_{3}O^{+}
I'm adding back spectator ions, K+ and Cl-.
KBrO_{3} + NH_{3}OHCl + H_{2}O --> KBr + KNO_{3} + 2H_{3}O^{+} + HCl
As you can see I have 1 K and 1 Cl on the left, but 2 K and 1 Cl on the right. And...
Would anyone happen to know where I could find the standard Rf values (for Chlorophyll a, Chlorophyll b, Xanthophyll, and Carotene) if varsol is the solvent? I'm trying to identify those plant pigments via Paper Chromatography, and I'd like to compare my results to the standards. The problem is...
Aha, that makes perfect sense. I probably should have thought it out more. I just worked out the answer using your tips and it shows to be correct.
Thanks for the help guys, and I'll keep that in mind Rich. :)
Question: Find an equation of the straight line that is tangent to the graph of f(x) = √x+1 and parallel to x-6y+4=0.
I've found f`(x).
When I write lim, assume "h->0" (as h approaches 0) is beneath it. I'd like to use LaTex to show you, but it seems too confusing to figure out.
f`(x)=lim...
You shouldn't trust wiki articles ever since they are free to edit and can be made by anyone. They are good articles for basic knowledge but don't rely on it for facts because more often than not there is an error lying in it.
Now whether it is Mermin or Feynman is a different story...and an...
I'm pretty sure they're melting because of global warming. Actually, I heard somewhere that in many, many years down the road the melting of these glaciers will cause much of land to flood up quite a bit. Do you think that's something worth worrying about? I probably won't be alive by then, but...
I believe this could very well be a real or 'new' species. But with all the sitings of these types of things (sea monsters, forest monsters), why can't we come up with a body? I don't doubt the possibility, but I just wish there could be more evidence. Shame the tape didn't produce the best...
Is it the plan to eat the instrument after the presentation or is that just hypothetical?
If so, say you did use a carrot or celery...
It would have to be dry in order to make it and produce good sound, wouldn't it? Would water in that sense, have a great effect on the sound? Or could you...
You're balancing the equation, right? After you've added electrons to balance the charge, that should be your last step. However if the solution is basic, you can add water in order to cancel out all the hydrogens.