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The Mole: Avogadro’s Number and Stoichiometry

I know moles are annoying mammals that tear up my yard, but in chemistry, we use numerical moles to make predictions about reactions. Let Professor Dave show you the way.

Aligned with Next Generation Science Standards: HS-PS1-7: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction. Clarification Statement: Emphasis is on using mathematical ideas to communicate the proportional relationships between masses of atoms in the reactants and the products, and the translation of these relationships to the macroscopic scale using the mole as the conversion from the atomic to the macroscopic scale. Emphasis is on assessing students’ use of mathematical thinking and not on memorization and rote application of problem-solving techniques.

Supports IAS C.4.4: Apply the mole concept to determine the mass, moles, number of particles, or volume of a gas at STP, in any given sample, for an element or compound.