68.5 grams of a certain compound contains 5.25*10^25 molecules. What is the molar mass of the compound?
I don't know how to start the conversion. Can somebody please give me the conversion factors? Thank You.
2007-01-24 13:32:31 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It's been a while since I did this, but I am pretty sure you want to use
Avogadro's number = 6.0221415 × 10^23
So if 5.25*10^25 weighs 68.5 grams, then 6.0221515*10^23 weighs ?
x = 5.25*10^25/6.022...*10^23 * 68.5
2007-01-24 13:37:59 · answer #1 · answered by firefly 6 · 0⤊ 0⤋
Ok so there are 6.02x10E23 molecules of any compound in 1 mole. That's Avagadro's law. Once you get the moles of the compound all you need to do is divide the given grams( 68.5) by the number of moles you got and this should give you your molar mass
2007-01-24 21:51:26 · answer #2 · answered by oldegolde2004 3 · 0⤊ 0⤋
Divide 68.5 by the other number...I think. It will give the mass of one molecule.
2007-01-24 21:39:56 · answer #3 · answered by TIM D 2 · 0⤊ 0⤋
yupe. use the avogrado number which is 6.02x10^23.
that is the key number.
read up on your textbook :P
2007-01-24 21:55:23 · answer #4 · answered by friedeggy 2 · 0⤊ 0⤋
yea we so just did this!! to bad i don't remember!! lol! sorry
2007-01-24 21:36:40 · answer #5 · answered by ? 1 · 0⤊ 2⤋