Topic 3 Regents Chemistry Review: Math & Stoichiometry

Math in Chemistry

Math is essential in chemistry for determining amounts of chemicals in reactions.

Formula Mass

The sum of atomic masses in a compound's formula, crucial for understanding compounds' mass relations.

Gram Formula Mass

Formula mass expressed in grams, simplifying calculations and comparisons of substances.

Percent Composition

Calculating the percentage by mass of each element in a compound using atomic masses and subscripts.

Hydrates

Crystalline substances with attached water molecules, represented in formulas, impacting mass calculations.

The Mole

A specific number of particles in a mole (6.02 × 10^23), defined by Avogadro's number, aiding in mass calculations.

Percentage composition

The percentage by mass of each element in a compound, calculated by dividing the mass of each element by the total mass of the compound and multiplying by 100%.