Posted by Astrid on Sunday, March 14, 2010 at 2:18pm.
How many carbon tetrachloride (CCl4) molecules are in 3.00 mol of CCl4? How many carbon atoms? How many chlorine atoms? How many total atoms?
I have no idea how to do all of this =\

Chemistry  DrBob222, Sunday, March 14, 2010 at 3:12pm
There are 6.02 x 10^23 molecules in a mole of CCl4 or a mole of anything else. So if one mole contains 6.02 x 10^23 molecules, how many molecules will be in 2 moles? 3 moles? 4 moles?
After you know how many molecules of CCl4 you have, look at the formula. There is 1 carbon atom per molecule of CCl4. So if you have 6.02 x 10^23 molecules of CCl4 and each one of those contains 1 atom of C, how many atoms of C will you have?
For Cl, notice you have 4 atoms of Cl for every molecule of CCl4.
Total atoms must be atoms C + atoms Cl.