Recent content by dmoravec

well it depends what '3' is attached to. fluorocarbons are not ionicly bonded, but fluorine is commonly an anion. So both 3 and 4 could be anions, but it would depend what they are bonded with.

remember, anions occur when electrons are transfered...

try induction assuming that a(o) is less than the maximum a value...

Since 3*k_b*T will be the same for both of the uranium isotopes you could ignore it and leave it as a variable 'A' or just completely remove it. Then you could get an easier formula V_rms = (A/m)^1/2 When you set the ratio of V_rms_1 / V_rms_2 just go ahead and cancel the A values out and...

try and draw out the structure of XeF4 and count the electrons. If you draw the correct structure your question should be answered.

Have you done any work on this problem? If you show work we can help you through the problem. Do you have the equation of the reaction?

you need to show some work for us to help you. What have you tried doing/what equations do you have?

a good way to go about this problem is to convert the mass of aluminum nitrate into moles of aluminum nitrate, then you can figure out how many moles of magnesium (do you mean aluminum or magnesium nitrate) were produced.

well, you have an equation for Ea... rearrange it to solve for Ea. What variables do you know? What variables do you need? hint: you might not have to solve for each k value individually

When a point has derivative zero it can be a min, max or a saddle point. The hessian is needed to determine which of those three types the point of interest is. If the hessian (second derivative) switches sign it is a saddle point. If you didn't check the hessian one might not be sure that...

what are the results of 'sparking' methane and ethane with oxygen? i.e. what are the products of combustion?

theoretically with the correct stationary phase and mobile phase and if the isomers have slightly different chemical properties, then yes.

Most pictures I have seen show the extra electrons flowing in the top layer (so n-on-p). If you think about it, the extra electrons in the n-doped silica are the ones that have to be excited, therefore they should be on top to receive maximal sunlight.

It would probably be difficult to separate those compounds by TLC due to their similarity in structure and the choice limitations one has with TLC as well as collecting the sample once it has separated. A similar technique would be liquid chromatography. Packing the column with an appropriate...

Can't see that link while at work, but teflon is supposed to be stable to temperatures above 250degC. When actually cooking these temperatures are not reached, but if a pan were to get above that sort of temperature it can degrade and offgas.