Discussion: The Mole Objective: To understand the mole concept and how it is related to the more familiar dozen.

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Presentation transcript:

Discussion: The Mole Objective: To understand the mole concept and how it is related to the more familiar dozen.

The Dozen How do you convert a number like 54 to dozen? we divide by 12 How do we convert dozens to numbers? Multiply by 12

Counting atoms How many atoms are there in a single molecule of

The dozen is not used to measure atoms Why would we not measure atoms in dozen? They are to small The quantity used to express how many in atoms is the mole. It is equal to 6.02 x 1023

6.02 x 1023 Which, if not written in scientific notation is Mole = 602,000,000,000,000,000,000,000 Dozen = 12 Dozen = 1.2 x 101 Mole = 6.02 x 1023

How many BB are in 2.5 dozen? If we wanted to find the number of baseballs in 2.5 dozen we would multiply _____ by _____ = ______

How many atoms are in 2.5 moles of sodium? If we wanted to find the number of atoms of sodium in 2.5 moles we would Multiply 2.5 by 6.02 x 1023 = 1.505 x 1024

How many atoms are in 0.5 moles of calcium? 0.5 x 6.02 x 1023 = 3.01x 1023 Another way 0.5 mol

Convert 5.6 x 1023 molecules of oxygen to moles

How to find the mass of one mole of an element To find the mass of one mole of sodium we look on the periodic table. 1.00 mole Na = 23.0 grams 4.2 moles 4.2 x 23 = 96.6

Calculate the formula mass of the compounds below CuCO3 63.5 + 12 + (3 x 16) = 123.5 Ba(NO3)2 = 137.3 + 2 x 14 + 6 x 16 = Ca3(PO4)2 Sodium chloride Iron(III) oxide Fe2O3 2 x 55.8 + 3 x 16 = 159.6

Find the equality for the compounds below 1.00 mole CuCO3 = 123.5g 5.0 grams CuCO3 0.0404 moles CuCO3

How to do the worksheet

More Worksheet

Quiz 1. How many grams in a mole of sodium? 2. How many grams in a mole of sodium chloride? 3. How many grams in a mole of oxygen? 4. If you have 56 grams of carbon monoxide you have ______ moles 5. how many atoms are in one mole?

Quiz 6. How many moles of oxygen atoms are in one mole of oxygen molecules? 7. How many moles of hydrogen atoms are in two moles of C12H22O11 molecules? 8. 2.5 moles of K2O = _____ grams. 9. How many dozen eggs are in 2.4 x102 eggs? 10. 3.01 x 1023 = _______ moles