Jerryt12

In a hydrogen fuel-cell, hydrogens are passing through a platinum catalyst. As it go through, it's split into hydrogen ions and electron. So how does the platinum catalyst does that? What are the science behind it.

A lot of reactions are simple to predict; the acid-base reaction and the single and double replacement reaction that can be predicted by looking at the activity series. My question was how do you predict an reaction that has to do with nonmetal. For example, how do you know if H2O will react with NO2? Hydrogen is on the activity series but Nitrogen is not since it is a nonmetal. Please do help

sorry, I mean exclude the electrons for now and think about the nucleus itself. Merged post follows: Consecutive posts mergedI know that electron excitation is the phenomenon that is being played, but I am wondering if the atom itself(that is including the nucleus) is also being excited

thanks Merged post follows: Consecutive posts mergedas occur in a fuel cell

why will the voltage drops if you add another load? Did the velocity of the electrons slow down?

In the way battery works, redox reaction is taking place. My question was why does the oxidized electrons (after being used to power motor, ect...) was used to reduce another substance when instead we can keep using the electrons to power another device? or can we?

go to the bottom of the the website for the video http://www.howstuffworks.com/battery.htm The video was great, but it fails to explain why zinc oxidizes in that solution. Merged post follows: Consecutive posts mergedbasically my question was how did zinc loses electrons

A strong acid is a substance that contains high concentration of hydronium ion, basically high concentration of hydrogen. But why are acid so reactive( or dangerous)? Is it because the intermolecular forces between the atoms of the acid are weak? Merged post follows: Consecutive posts mergedLet me re-phase the last sentence. Is it because the intermolecular forces between the atoms of the acid are weak so they are very reactive?

How do scientists know which catalyst to use in different reactions? For example, how do scientists know to use acid for esterification?

please explains

atoms form bonds with each other to be stable, right? If so, how come substances like hydrocarbon are so volatile? Souldn't it be stable?

can you give an example? Merged post follows: Consecutive posts mergedthanks, but can you tell by looking at the electron configuration?

I was reading "QED" by Richard Feyman. I understand the method they used to calculate the possibility of partial reflection. But there is one thing that I just can't stop myself from thinking about it, (in the book, they say that the phenomenon of partial reflection can easily be explained by the wave theory of light. (the wave theory collapsed after the developed of instrument that can detect a single photon was invented.) My question was how was the partial reflection easily explained by the wave theory of light? (All that the book had mention was that wave can combine or cancel out, thus explained the partial reflection phenomenon.) But, how did that explain? Merged post follows: Consecutive posts mergedby the way, QED= quantum electrodynamics

Ex: CH4 + 2 O2 ----> CO2 + 2 H2O + 802.5KJ Also, where can we find a list of reactions with their catalyst? Thank you.

Can we tell if a substance is going to produce a lot of energy (when go through a chemical reaction) by looking at their electron configuration?

I know that the properties of a substance depends on their electron configuration. So how would we know if a substance is volatile by looking at their electron configuration? Merged post follows: Consecutive posts mergedso if we're burning woods, is oxygen the volatile substance that start the fire?

Dear Simpleton, I once thought the way you do because light travels the fastest in a vacuum, thus making that hypothesis very supportable. But If what you said is true, then electromagnetic wave will be able to propagate without electromagnetic field. If that is the case, what is the relationship between electromagnetic wave and electromagnetic field?

Just to make sure, what you're saying is the field propagates into the vacuum, thus making it possible for light to travel through?

electromagnetic field is the medium of electromagnetic wave. if that is true, without electromagnetic field, there will be no electromagnetic wave. every object, gas, liquid have their own magnetic moment and electric field, thus creating a electromagnetic field so light can travel through. If what I just said is true, how can light travels in a vacuum when there is no electromagnetic field present?

Hora2002, Merged post follows: Consecutive posts mergedcan you give an example for each of the different chemical reactions you mentioned? Ex: A (g)+ B (g) ---> AB (s)

If endothermic reactions is less stable, then it is easier for them to go the reverse way right?

out of curiosity, does different chemical reactions require different catalyst? or a catalyst can be used in all types of chemical reactions?

For example: gasoline Is it because of their electron configuration? If so, how does it plays in the role of producing vast amount of energy?

I know there're two ways in which catalyst works--adsorption and by forming intermediate compounds. Simply, a catalyst stick to the surface of the reactant and increases their chances of collide with each other. That increases the reaction rate because the speed in which a reaction occurs is depends upon the rate in which the molecules collide. Is it because of their electron configuration that they don't react(catalyst)?