Bell Work
NH3 + O2  N2 + H2O
How many moles of oxygen react
with 0.23 moles of NH3?
Limiting Reagent
Game of Ratios
Make a Table
Write the ratios
Write multiple ratios
O2 + 2NO  2NO2
Amt O2
Amt NO
1
2
molecule molecule
4
4
molecule molecule
2
8
molecule molecule
Amt
NO2
Limiting Excess
Reactant
Complete Worksheet
Numbers 1 to 18
Questions
What would be different if you had mass
instead of moles?
What is the difference between a limiting
reagent and excess reagent?
More Practice
• Open the Link
• virtual lab link
C 1
H 4
O 2
1
2
3
ID the limiting reagent.
How do you know?
ID the limiting reagent.
How do you know?
Balance the equation
Go to the virtual lab and check the answer.
2 reactants that
you can control
Go to the virtual lab and select
different number of moles.
Copy and fill in the table on
the next page.
Circle the Limiting Reagent,
Calculate the moles CO2, Calculate Excess
Moles
C2H6
Moles
O2
Moles
CO2
Excess?