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Put these stoichiometry steps in a helpful order for solving a mass-to-mass problem (grams of reactant → grams of product).
  • Convert given grams of the starting substance to moles using molar mass.

  • Use the balanced-equation mole ratio to convert moles of starting substance to moles of target substance.

  • Balance the chemical equation.

  • Convert moles of the target substance to grams using molar mass.

Course
General Chemistry I Foundations: Measurement to Reactions, Gases
10 units43 lessons
Topics
General ChemistryAnalytical/Quantitative Reasoning (dimensional analysis and algebra for chemistry)Physical Chemistry (intro topics: thermochemistry, gases, equilibrium, kinetics)
About this course

Build a reliable General Chemistry I problem-solving foundation starting with measurement, SI units, scientific notation, significant figures, uncertainty, and dimensional analysis. Develop chemical reasoning through atomic structure, electron configurations, periodic trends, nomenclature, and formula writing. Apply these tools to balance and classify reactions, write molecular/ionic/net-ionic equations, and perform stoichiometric calculations including limiting reagents and yield. Extend quantitative skills to gases (PV = nRT, partial pressures), phases and intermolecular forces, thermochemistry and calorimetry, solutions and concentration-based stoichiometry, acids–bases (pH, strong/weak, Ka form), equilibrium and Le Châtelier’s principle, and an introductory view of kinetics and rate factors.