Equivalents of Moles

1
Equivalents of Moles

• 1 Mole
• 6.02 X 1023 molecules, atoms
• 22.4 Liters
• Gram formula mass (H2O 18 grams)

2
Solving Mole Tip

• Given (units wanted)
• (units given)

3
Mole and Mass

• Determine of moles in 25 grams of NaCl
• 25 grams NaCl ( 1 mol NaCl)
• (58.5 g NaCl)
• 0.4 mol NaCl

4
Mole and Mass continued..

• Determine of grams in 2.5 mol of NaCl
• 0.4 mol NaCl
• 146.3 g NaCl
• 2 mol NaCl
• 77.2 g NaCl
• 2.5 mol NaCl (58.5 g NaCl)
• (1 mol NaCl)
• 146.3 g NaCl

5
Mole and Volume

• What volume of 3.2 mol O2 occupy at STP?
• 3.2 mol O2 (22.4 L)
• (1 mol O2)
• 71.68 mol

6
Mole and Vol. continued

• What volume will 100 g of O2 occupy at STP?
• 70 L O2
• 90 L O2
• 22.4 L O2
• 140 L O2
• 70 L