take this for example: A + 2B --> C
You have 1 mol A and 1 mol B, which gets used up first?
Since for 1 mol of A you need 2 MOLS of B to make 1 mol C, B gets used up twice as fast as A does because more of it is required to make the same amount of C. Therefore, B gets used up first and you’re left with 0.5 mol A
Im out good luck! We all can get a 5!
can someone answer this please…
you have the balanced equation and you have both delta G and delta H values, for example delta H is -400 KJ/mol and delta G is -500 KJ/mol so you would go from grams of substance to mol, then mol of substance to Kj/mol of the rxn, but would you use delta G or H? I thought it was H before, but in this question on PR it uses delta G
@Frigidcold
How can you tell the nuclear distance based on the atoms?
@Batmen No offense, but really… Can you not tell me which is bigger, a hydrogen atom or a nitrogen atom?
Lol finished the 2014 FRQs in an hour. I feel so cocky now XD… This will end up killing me, lol.
@Frigidcold LOL
@elyvine But seriously lol… I understand apactstudent so much. How do you pass regular chem, let alone AP chem, without knowing this…?
No offense, but can you tell me which atom has a bigger atomic radius, a nitrogen atom or an oxygen atom?
^I would go over atomic trends if I were you.
@dsi411 When you mean magnetic moment with unpaired electrons, you mean… For example, nitrogen having 3 unpaired electrons in its 2p orbitals? And oxygen with 2 unpaired electrons? I just wanna verify 
@Batmen if you knew any sort of periodic trend up in that noggin you’d know that oxygen would have a smaller radius than nitrogen
^LOL thanks for that laugh!
I know that oxygen has a smaller atomic radius than nitrogen. I was asking that guy because he was implying that size was the reason oxygen has a larger internuclear distance than nitrogen.
What is this atom you speak of?
I don’t think there is any reason to make fun of others or berate them for not knowing stuff, they are looking for help, whether it be last minute or not. I took AP CHEM without any other science class before hand except APES and regular bio and I am having a lot of trouble so I can sympathize with lots of people here who are struggling.
@strongandweakguy Ik, and I genuinely am not trying to imply anything @Batmen, I guess I’m just flabbergastered at how someone gets so far without knowing a basic concept and a little empathy mixed into there (I would want to know periodic trends 12 hours before the AP test). Sorry 
@Frigidcold
Lol. Okay, so you just guessed on #17. Its okay to admit it.
@Batmen Yeah I did, I wrote it in an earlier post. Not trying to hide anything about that. xp
@Batmen Guessed correctly though and based on something (not completely blind), so I’ll take it either way.