Solve a Stoichiometry formula step-by-step, :D

1. Javerlyn Walls
Amanda Hodge
Sergio Camacho

2. Stoichiometry
• A branch of chemistry
that deals with the
relative quantities of
reactions and products in
chemical reactions.
(Balancing Equations)

3. – Step one: Analyze the question
• What is it asking?
– How many grams of H2O after
reaction.

4. –Step three: Write the Formula.
C3H8 + O2  CO2 + H2O

5. Step Five is a long Process
– Step five: Determine the number of batches in
Propane.
• Write the formula for propane
– C3H8
• Determine the molar mass.
– C = 12 ; C3 = 36
– H=8;H=8
– 36+8 = 44. Molar mass = 44.
• Divide the total grams by the molar mass.
– 165
44 3.75 batches

6. Calculating Moles

7. Final Steps.
– Step Seven: Determine the molar mass of Water.
• Write the formula.
– H2O
• Solve for the molar mass.
– H=1.1X2=2
– O = 16.
– 2 + 16 = 18. The molar mass is 18
– Step eight: Determine the overall mass.
• Multiply.
15 18 270
How many grams of water do you get
from the combustion of 165 grams of
propane?