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3.2 Calculations with Moles | Stoichiometry | General Chemistry
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Chad covers calculations with moles in this lesson. The mole is first defined as Avogadro's number (6.022x10^23) and it is shown how to use Avogadro's number to calculate from moles to molecules, moles to atoms or from molecules to moles or atoms to moles.
Chad then compares and contrasts four terms: atomic weight, molecular weight, formula weight, and molar mass. It is then shown how these can be calculated from the periodic table and then used to convert grams to moles or moles to grams. Finally, Chad shows how a chemical formula provides mole to mole ratios of the different atoms a compound is composed of and how these are used to determine the number of atoms or moles of one to the number of atoms or moles of another. Several mole to mole ratio practice problems are completed.
00:00 Lesson Introduction
00:57 What is a Mole?
06:24 Atomic Weight
08:15 Molecular Weight vs Formula Weight vs Molar Mass
12:35 Converting Moles to Molecules or Atoms with Avogadro's Number
15:45 Converting Moles to Grams and Grams to Moles Using Molar Mass
19:10 Calculations with Moles Examples
Chad then compares and contrasts four terms: atomic weight, molecular weight, formula weight, and molar mass. It is then shown how these can be calculated from the periodic table and then used to convert grams to moles or moles to grams. Finally, Chad shows how a chemical formula provides mole to mole ratios of the different atoms a compound is composed of and how these are used to determine the number of atoms or moles of one to the number of atoms or moles of another. Several mole to mole ratio practice problems are completed.
00:00 Lesson Introduction
00:57 What is a Mole?
06:24 Atomic Weight
08:15 Molecular Weight vs Formula Weight vs Molar Mass
12:35 Converting Moles to Molecules or Atoms with Avogadro's Number
15:45 Converting Moles to Grams and Grams to Moles Using Molar Mass
19:10 Calculations with Moles Examples
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