1. Warm-Up How many molecules are in 5.78 mol of ammonium nitrate?
What is the volume (in liters) of 835 g of SO3 gas at STP?

2. Stoichiometry

3. Stoichiometry
The relationship between the relative quantities of substances in a chemical reaction.
Example: N2H4 + 2 H2O2  N2 + 4 H2O
Mole Ratio:
1 mol N2H4 = 2 mol H2O2 = 1 mol N2 = 4 mol H2O

4. Practice Problem 1
How many liters of oxygen gas are necessary for the combustion of g of ethanol (C2H5OH)? The balanced equation is:
C2H5OH + 3 O2  2 CO2 + 3 H2O

5. Practice Problem 2
What volume of hydrogen gas, when combined with nitrogen gas, is necessary to produce 16.0 L of ammonia gas (NH3)?

6. Practice Problem 3
How many moles of bromine gas are produced when fluorine reacts with g of potassium bromide?

7. Practice Problem 4
In a thermite reaction, powdered aluminum reacts with iron (III) oxide to produce aluminum oxide and molten iron. What mass of aluminum oxide is produced when 2.3 g of aluminum reacts with iron (III) oxide?