Chemistry, moles??

ok so moles are stupid and hard to understand... i understand the very basics.. now the stupid teacher has gone psycho and i dont understand...





here are a few weird questions





a sample of 22.76 grams of aluminum dihydrogen phosphate has.. how many moles of compound?...how many moles of oxygen in it??? how many grams of oxygen in it?





well i have a billion more questions... and if i up them all up... chances are... nobody is gonna anwer them... can someone explain how to do number one?... it would REALLY REALLY ReALLY help if u drew a pic on like... microsoft paint or something...





thanks a ton...(exam like... friday... and... dont know how to do like any of this...)

Chemistry, moles??
Here's a crappy diagram of the conversions.


I'm not sure if you would understand it,


http://img.photobucket.com/albums/v66/Ka...





Using this diagram..


http://img.photobucket.com/albums/v66/Ka...





edit: oops i made a mistake. in the last part, it should say convert mol of O to grams of O
Reply:One mole is equal to 6.022 x 10exp.23 paticles, atoms, or molecules. It's always gonna be that #. Just use it to convert. Report It

Reply:grief...that is all I can say about chemistry. Equations drove me nutts...If you don't know it by now, ask if you can be tutored after class for an hour after each class. Otherwise...it's gonna be rough.


I passed it, but it was helloooo!


(@v@)





Good luck and PRAY ♥
Reply:No giving up....





Your item in formula is Al(H_2PO_4)_3





the _2 is sub 2 and _4 is sub 4





If you add the 1 Al + 6 H's +3 P's +12 O's you will get grams in a mole of compound.





In one mole of Alum Dihy phos you have 12 moles of oxygen....or you might say 6 moles of O_2 since that is how oxygen is usually found.





and then just multiply by (I think 32) for O_2 for number of grams.