General & Organic ChemistryLesson 1 of 3

Stoichiometry, Molarity & Limiting Reagents

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Quantitative chemistry problems require calculating moles, concentrations, and yields.

Fundamental Formula: \(n = \frac{m}{M}\) where \(n\) = moles, \(m\) = mass (g), \(M\) = molar mass (g/mol).
Molarity (Concentration): \(C = \frac{n}{V}\) (mol/L).
Limiting Reagent: Divide available moles of each reactant by its stoichiometric coefficient in the balanced equation. The reactant with the smaller ratio is completely consumed.

Exam strategy

Focus on understanding underlying concepts — exam questions test application, not memorization.