Tuesday 29 November 2011

The Day Mr.Doktor Was Away

We had a sub for this class, and Mr.Doktor left us some with a worksheet and some homework. Here is a few examples and an overview of what was assigned:

Moles to Atoms/Molecoles 
Molecules/Atoms to Moles


EX. How many atoms are there in 1.5mol or Iron?

1.5 mol x 6.02E32 atoms = 9.03E23 atoms
                        1mol

How many moles of magnesium bromide (MgBr2) contain 5.28E24 formula units?

5.38E24 FU x 6.02E23 FU = 8.94 mols
                          1 mol


Determine the number of atoms that are in 0.58 mol of Se.

0.58 mol x 6.02E23 = 3.5E23 atoms
                     1 mol

Janine R

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