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3 cards from this section. Quick, good the night before a test.
What is stoichiometry?
Think about measuring ingredients in a recipe.
Define limiting reactant.
Consider what restricts further reaction from occurring.
What is stoichiometry used for?
Consider what aspect of chemistry relates to measuring.
True or False: The limiting reactant is the one that remains after a reaction.
Reflect on what happens after a reactant is used up.
A reaction between nitrogen (N₂) and hydrogen (H₂) produces ammonia (NH₃) with the equation N₂ + 3H₂ → 2NH₃. If you have 25g of N₂ and 10g of H₂, how much NH₃ can you produce? Identify the limiting reagent.
Molar mass of N₂ = 28g/mol; H₂ = 2g/mol.
Combustion of propane (C₃H₈) yields CO₂ and H₂O according to the balanced equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O. If you start with 100g of C₃H₈ and have an excess of O₂, how much CO₂ will be produced?
Molar mass of C₃H₈ = 44g/mol; use its ratio from the balanced equation.
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