Mole Conversions (Converting between grams and moles)

Converting between moles and mass(grams):
1) To convert the units, we use molar mass as the conversion factor. Molar mass is the number of atomic mass added together.
2) Be sure to cancel out the appropriate units.
* remember about the significant digits!
Examples:

How many grams are in 2.5 mol of Cl2?

2.5 mol x   71g      = 1.8 x 10^2 grams
                1 mol
           
How many moles are there in 205g of BeF2?

205g x   1 mol  = 4.36 mol
                47 g



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-Candace Chan