Stoichiometry Notes I
 Stoichiometry: Ability to convert from one substance to another in a _______________________ equation by the use of a _________________________________
o Mole Ratio: Conversion from mol  mol
→ Uses ___________________ in the balanced equation
o General Setup
Process
1. Write Balanced Equation
2. Read Problem and find …
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3. Solve it
Ex #1: How many moles of Al are needed to form 2.3 moles of Al2O3?
______ Al + _____O2  _____ Al2O3
Given:
Unknown:
Steps:
Ex #2: Calculate the mass of MgO produced from the reaction of 2.50 mol Mg and
excess Oxygen.
Given:
Unknown:
Steps:
Ex #3: Calculate the # of moles of H2O produced when 8.08 g H2 reacts with an
excess of O2.
Given:
Unknown:
Steps: