Happy Birthday Christy (1979) Read Chapter 6 section 1-5 (again) Mastering Chemistry New assignment will be posted later today Due Thursday by 11:59PM

Using Avogadro’s number How many molecules are there in 13.251 mol of carbon tetrachloride? 1 mol CCl4 = 6.022x1023 molecules CCl4

The mole Only 2 options of what to do with the mole: mole particles Avogadro’s # mole particles molar mass mole mass

The mole Only 2 options of what to do with the mole: mole particles Avogadro’s # mole particles

The mole Only 2 options of what to do with the mole: mole mass molar mass mass

81.534 grams of water is equivalent to how many moles of water? The mole 81.534 grams of water is equivalent to how many moles of water? game plan: g  mol game plan: g game plan:

The mole How many grams of carbon dioxide are contained in a chunk of dry ice with 1.8199x1023 molecules of carbon dioxide? game plan: molecules  mol game plan: game plan: molecules game plan: molecules  mol  grams

The mole A helium balloon contains 4.9232x1021 atoms, how many grams of helium are in the balloon? game plan: atoms  mol game plan: atoms game plan: game plan: atoms  mol  g

How many molecules are in of 25.00 kg of gaseous UF6 at STP? The mole How many molecules are in of 25.00 kg of gaseous UF6 at STP? game plan: kg game plan: game plan: kg  g  mol game plan: kg  g  mol  molecules game plan: kg  g

The mole Only 2 options of what to do with the mole: mole “X” mole “Y” mole-to-mole ratio mole “X” mole “Y”

The mole Only 2 options of what to do with the mole: 2 places to find a mole-to-mole ratio: a chemical formula H2O mole-to-mole ratio comes from the subscripts of the formula

The mole Al2S3

The mole Only 3 options of what to do with the mole: mole particles Avogadro’s # mole particles molar mass mole mass mole-to-mole ratio mole “X” mole “Y”

The mole How many ATOMS of nitrogen are in 6.119 moles of ammonium sulfide? (NH4)2S We know a conversion from moles of (NH4)2S to moles of N We know how to get between moles and atoms: