Saturday

September 20, 2014

September 20, 2014

Posted by **Bob** on Sunday, March 8, 2009 at 9:32pm.

If needed (i'm not sure), the moleculatr mass of C2HBrClF3 is 197.381.

- Another Chem Problem -
**DrBob222**, Sunday, March 8, 2009 at 10:01pmJust use dimensional analysis to see how it works. There are 6.02 x 10^23 molecules in a mole of molecules and there are 3 F atoms in the C2HBrClF3 molecule. So start with what you have and use factors to get where you want to go.

12.15 moles Cx x factor x factor = # F atoms.

12.15 moles Cx x (6.02 x 10^23 molecules Cx/1 mol Cx) x (3 F atoms/1 molecule Cx) = ??

Note that moles Cx (in the 12.15) cancel with the mol Cx in the first factor and molecules Cx in the numerator of the first factor cancel with molecules Cx in the denominator of factor 2, leaving F atoms which is the unit you want to keep.

- Another Chem Problem -
**Bob**, Sunday, March 8, 2009 at 10:16pmAlright, now I am starting to understand. Thanks!

**Answer this Question**

**Related Questions**

chemistry - calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^...

Chem - Superscript 15 How many moles of Pb is 9.3 X 1015 atoms of pb? 1 mol of ...

chemistry - Can somebody please check my answer for this one? Calculate the ...

Chem 101. Science - Rank the following samples in mass from least to greatest. a...

Chemistry - Calculate the total number of atoms in 0.00102 mol CH3(CH2)4CH2OH ...

Check a chemistry answer - So I think I have done this problem right, I was just...

chemistry - I'm having a little trouble doing a worksheet. 1.25 moles of KBr ...

Science - Chemistry - How many atoms are in 12g of Zinc? There are 6.02 x 10^23 ...

chemistry stoichiometry - My chem teacher gave us this problem Twelve-gauge ...

Chemistry - If a sample of Co2(CO)8 is found to contain 6*10^-2 mol of C atoms, ...