The Mole Counting Matter
Counting Matter What are some everyday ways we count matter? 1. 2. 3. What about molecules? Or atoms? DOZEN = 12 things BU...
The Mole <ul><li>It represents a counted number of things.  </li></ul><ul><li>IN Chemistry the term MOLE represents the nu...
Just how many is a mole? <ul><li>One mole  represents  6.02 x 10 23  of things (units, molecules, compounds, formula units...
Just how big is a mole? <ul><li>An Avogadro's number of standard soft drink cans would cover the surface of the earth to a...
Sample Problems <ul><li>How many molecules are in 3.00 moles of N 2 ? </li></ul><ul><li>How many moles of Na are in 1.10 x...
Practice moles to particles <ul><li>Determine the number of atoms in 2.50 mol Zn. </li></ul><ul><li>Given 3.25 mol AgNO 3 ...
Practice Particles to Moles <ul><li>How many moles contain each of the following? </li></ul><ul><ul><li>5.75 x 10 24  atom...
  Mass & the Mole
Molar Mass <ul><li>Molar mass : is the mass, in grams, of one mole of a substance </li></ul><ul><ul><li>Atomic masses (fro...
Molar Mass Practice <ul><li>What is the mass of 1.00 mole of Oxygen? Of Nitrogen? </li></ul><ul><li>Find the molar mass fo...
Practice Problems <ul><li>Determine the molar mass of each of the following ionic compounds:  </li></ul><ul><ul><li>NaOH <...
Grams-Mole Conversions <ul><li>How many moles are in 56.8 g of carbon? </li></ul><ul><li>How many grams are in 0.56 moles ...
Practice Gram to moles <ul><li>How many moles are in each of the following samples? </li></ul><ul><ul><li>55.2 g Li </li><...
Mass to Particle Conversion <ul><li>Gold is one of a group of metals called the coinage metals (copper, silver and gold). ...
Practice Problems  Mass to Particles <ul><li>How many atoms are in each of the following samples? </li></ul><ul><ul><li>55...
Particle to Mass Conversion <ul><li>A party balloon contains 5.50 x 10 22  atoms of helium (He) gas.  What is the mass in ...
Practice Problems: particles to mass <ul><li>What is the mass in grams of each of the following? </li></ul><ul><ul><li>6.0...
Upcoming SlideShare
Loading in …5
×

The mole

2,638 views

Published on

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
2,638
On SlideShare
0
From Embeds
0
Number of Embeds
338
Actions
Shares
0
Downloads
36
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

The mole

  1. 1. The Mole Counting Matter
  2. 2. Counting Matter What are some everyday ways we count matter? 1. 2. 3. What about molecules? Or atoms? DOZEN = 12 things BUSHEL of corn = 21.772 kg 1 GROSS = 144 things 1 MOLE = ???
  3. 3. The Mole <ul><li>It represents a counted number of things. </li></ul><ul><li>IN Chemistry the term MOLE represents the number of particles in a substance. </li></ul>In Chemistry is NOT this furry little animal or the spot on your face…
  4. 4. Just how many is a mole? <ul><li>One mole represents 6.02 x 10 23 of things (units, molecules, compounds, formula units). This is called Avogadro’s number. </li></ul><ul><li>One mole of a substance contains 6.02 x 10 23 particles. </li></ul><ul><li>1 mole Ag = 6.02x10 23 atoms of Ag </li></ul><ul><li>1 mole H2O = 6.02x10 23 molecules of H2O </li></ul><ul><li>602 000 000 000 000 000 000 000 </li></ul>
  5. 5. Just how big is a mole? <ul><li>An Avogadro's number of standard soft drink cans would cover the surface of the earth to a depth of over 200 miles </li></ul><ul><li>If you had Avogadro's number of un-popped popcorn kernels, and spread them across the United States of America, the country would be covered in popcorn to a depth of over 9 miles . </li></ul><ul><li>If we were able to count atoms at the rate of 10 million per second, it would take about 2 billion years to count the atoms in one mole. </li></ul>
  6. 6. Sample Problems <ul><li>How many molecules are in 3.00 moles of N 2 ? </li></ul><ul><li>How many moles of Na are in 1.10 x 10 23 atoms? </li></ul>
  7. 7. Practice moles to particles <ul><li>Determine the number of atoms in 2.50 mol Zn. </li></ul><ul><li>Given 3.25 mol AgNO 3 , determine the number of formula units. </li></ul><ul><li>Calculate the number of molecules in 11.5 mol H 2 O. </li></ul>
  8. 8. Practice Particles to Moles <ul><li>How many moles contain each of the following? </li></ul><ul><ul><li>5.75 x 10 24 atoms Al </li></ul></ul><ul><ul><li>3.75 x 10 24 molecules CO 2 </li></ul></ul><ul><ul><li>3.58 x 10 23 formula units ZnCl 2 </li></ul></ul><ul><ul><li>2.50 x 10 20 atoms Fe </li></ul></ul>
  9. 9. Mass & the Mole
  10. 10. Molar Mass <ul><li>Molar mass : is the mass, in grams, of one mole of a substance </li></ul><ul><ul><li>Atomic masses (from periodic table) represent molar mass. </li></ul></ul><ul><ul><li>Units: g/mol </li></ul></ul><ul><ul><li>1 mole of Carbon has 6.02 x 10 23 atoms of C and they have a mass of 12.01 grams. </li></ul></ul><ul><ul><li>The molar mass of carbon = 12.01 g </li></ul></ul>
  11. 11. Molar Mass Practice <ul><li>What is the mass of 1.00 mole of Oxygen? Of Nitrogen? </li></ul><ul><li>Find the molar mass for: </li></ul><ul><ul><li>SO 3 </li></ul></ul><ul><ul><li>Na 2 SO 4 </li></ul></ul>Tutorial Site 1 mole O = 16.0 grams 1 mole N = 14.0 grams SO 3 = 80 g/mole 1 Mole = 142.043g
  12. 12. Practice Problems <ul><li>Determine the molar mass of each of the following ionic compounds: </li></ul><ul><ul><li>NaOH </li></ul></ul><ul><ul><li>CaCl 2 </li></ul></ul><ul><ul><li>KC 2 H 3 O 2 </li></ul></ul><ul><ul><li>HCN </li></ul></ul><ul><ul><li>CCl 4 </li></ul></ul><ul><ul><li>H 2 O </li></ul></ul>
  13. 13. Grams-Mole Conversions <ul><li>How many moles are in 56.8 g of carbon? </li></ul><ul><li>How many grams are in 0.56 moles of Mg? </li></ul>
  14. 14. Practice Gram to moles <ul><li>How many moles are in each of the following samples? </li></ul><ul><ul><li>55.2 g Li </li></ul></ul><ul><ul><li>0.230 g Pb </li></ul></ul><ul><ul><li>11.5 g Hg </li></ul></ul><ul><ul><li>45.6 g Si </li></ul></ul><ul><ul><li>0.120 g Ti </li></ul></ul>
  15. 15. Mass to Particle Conversion <ul><li>Gold is one of a group of metals called the coinage metals (copper, silver and gold). How many atoms of gold (Au) are in a pure gold nugget having a mass of 25.0 g? </li></ul><ul><li>Known: Unknown: </li></ul><ul><li>Mass = 25.0 g Au </li></ul><ul><li>Molar mass Au = 196.97 g/mol Au </li></ul>Number of atoms = ? Atoms Au
  16. 16. Practice Problems Mass to Particles <ul><li>How many atoms are in each of the following samples? </li></ul><ul><ul><li>55.2 g Li </li></ul></ul><ul><ul><li>0.230 g Pb </li></ul></ul><ul><ul><li>11.5 g Hg </li></ul></ul><ul><ul><li>45.6 g Si </li></ul></ul><ul><ul><li>0.120 kg Ti </li></ul></ul>
  17. 17. Particle to Mass Conversion <ul><li>A party balloon contains 5.50 x 10 22 atoms of helium (He) gas. What is the mass in grams of the helium? </li></ul><ul><li>Known: Unknown: </li></ul><ul><li>Number of atoms = 5.50 x 10 22 atoms He </li></ul><ul><li>Molar mass He = 4.00 g/mol </li></ul>Mass = ?
  18. 18. Practice Problems: particles to mass <ul><li>What is the mass in grams of each of the following? </li></ul><ul><ul><li>6.02 x 10 24 atoms Bi </li></ul></ul><ul><ul><li>1.00 x 10 24 atoms Mn </li></ul></ul><ul><ul><li>3.40 x 10 22 atoms He </li></ul></ul><ul><ul><li>1.50 x 10 15 atoms N </li></ul></ul><ul><ul><li>1.50 x 10 15 atoms U </li></ul></ul>

×