View Full Version : Final Chemistry Review moles
Katiereading
Dec 16, 2007, 12:20 PM
Please someone help me with mole conversions
Problem one- How many representative particles are there in 1.45 g of a molecular compound with a gram molecular mass of 237 g?
How do I set this problem up to solve?
templelane
Dec 16, 2007, 12:41 PM
This is the equation you need to learn of by heart and rearrange as you require:
amount (moles) = Molecular Weight (g/mol) x mass (grams)
Then you'll be sorted!
EDIT
One mole = Avogadro's number (approximately 6.02214×10^23) of particles
ISneezeFunny
Dec 16, 2007, 12:45 PM
first, find out how many moles there are.
1.45/237 = .00612 moles of that particular compound
in each mole of any compound, there are... how many particles? Avogadro's number, that's how many.
so in 1 mole of any compound, there are 6.022 x 10^23 particles of that compound.
you have 0.00612 moles of it, so multiply
0.00612 x (6.022 x 10^23)