By: Matthew John Haworth XXXIII

1
The MOLE!!!

• By Matthew John Haworth XXXIII

2
Moles ? Volume

• To go to moles multiply by 22.4L
• 10molx22.4L224.0L
• To go back to moles divide by 22.4L
• 224.0L / 22.4L 10mol

3
Grams ? Moles

• 38g of N gas
• 38g N (1mole) 2.71 moles N gas
• (14g N)
• Divide 38g by 14g because that is 1 mole of N gas
• To go back to moles multiply 2.74 times 14g

4
Mole Map
22.4L1 mole
Gram Formula mass (PT) 1 Mole
5
Sample Problems

• Volume
• 55L O2 gas
• How many moles of O2 gas do you have?

• Grams
• 56g N2 gas
• How many moles of N2 do you have?

6
Sample Problem Answers

• 55L / 22.4L 2.46 mol

• 56g n2 ( 1mol)
• (28g n2)
• Answer 2 moles

7
Summary

• To go from Grams to moles you divide what you
  have by what a single mole of that substance is
  from the PT, to go back multiply the moles by the
  mole from PT
• To go from moles to volume multiply the moles by
  22.4L. To go back divide by 22.4L

8
(No Transcript)