Hey guys, i'm back, finished my term in physics with a 96% final grade, thanks to all you guys. So i thought id try you guys before i went to find a chemistry help forum. I get the Mole Concept, kinda, heres an example question (i got an answer, not sure if its right, we don't get a "back of the book" for chemistry. But its a great question to base my issues upon. If 1.0L of nitrogen gas reacts with 3.0 L of chlorine gas when both gases are at the same room temperature and pressure, how many chlorine molecules are present for every molecule of nitrogen in the reaction? Suggest a formula for the compound formed and name the compound. Alright, first of all, the mole concept illustrates that in a reaction, the amount of particles will always remain the same, or something close to that (ending spring break, trying to remember everything.) so i assumed their would me 3 molecules of chlorine, for every molecule of nitrogen, if it reacted with no leftovers, which i'm assuming.. would that be correct? So that was my answer, suggest formula was: [tex]ClN_3[/tex] Chlorine trinitride?? is that correct? and does it matter, if it was the otherway around, trinitrogen monochloride? Another question on the mole concept,. is how does it relate to grams? the atomic mass unit, for example 69.7u, refers to the unique mass in relation to hydrogen right? As it is 69.7 times heavier than H, (btw, im using Gallium for this example) that would also mean its 69.7grams/1mol Ga, how does it even relate to grams, grams is such a large unit for an amount of substance for an element. Does anyone have any further reading on the mole concept that would be good for a gr 11 highschool student.