Percent Composition

  • This video explains how to find the composition by mass of each element in a compound. The molar mass of the entire compound must be found in order to calculate the mass percent of each element in the compound.

  • This video uses an example to calculate the mass percent of an element in a compound by dividing the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100.

  • This comprehensive study guide provides explanations and examples of the following concepts: percent composition, determining percent composition from formula mass, determining empirical formulas, and deriving empirical formulas from percent composition.

  • This study guide explains how to calculate the mass ratio of sulfuric acid using the following four steps: (1) Determine the molar mass of each element present, (2) Determine the mass of each individual element present, (3) Determine the molar mass of the compound, and (4) Divide the mass of each element present by the molar mass.

  • This video explains how to calculate the percent yield, actual yield, and theoretical yield of a product produced in a chemical reaction given the mass in grams of the reactants. It also includes stoichiometry practice problems with limiting reagents and excess reactants.