Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
A stoichiometric coefficient refers to the number written in front of atoms, ions or molecules in a chemical equation that indicates relative amounts needed or produced from a reaction.
A balanced equation shows equal numbers (stoichiometric coefficients) on both sides for all atoms involved – just like ensuring you have enough ingredients before starting your cookie baking session!
Mole Ratio: This term refers to ratio between amounts in moles of any two compounds involved in a chemical reaction – it’s like comparing amount of flour used versus sugar used in your cookie recipe.
Reactant: A reactant is a substance that undergoes change in a chemical reaction. It's like the raw ingredients for your cookies.