Science 20: Chemistry - Moles and Mole Ratios

Flashcards covering key vocabulary related to moles, molar mass, mole ratios, and chemical equations.

Mole

The SI base unit that measures the amount of a substance, equivalent to 6.02 x 10^23 elementary entities.

Avogadro's Number

The number of particles in one mole of a substance, approximately 6.02 x 10^23.

Molar Mass

The mass, in grams, of one mole of a substance, typically expressed in g/mol.

Mole Ratio

The ratio of coefficients in a balanced chemical equation, indicating the proportion of reactants and products.

Molar Mass of NaCl

The total molar mass calculated as the sum of the molar masses of sodium (Na) and chlorine (Cl), which is 58.44 g/mol.

Chemical Reaction Coefficient

The number used in a balanced chemical equation to represent the number of moles of a substance involved in the reaction.

Elementary Entities

The basic units in a mole, which can include atoms, molecules, ions, etc.

Calculating Molar Mass of a Compound

To find the molar mass, add the molar masses of each individual atom in the compound based on its formula.

Mole Calculation Formula

To find the number of moles (n), use the formula n = mass (g) / molar mass (g/mol).

Balanced Chemical Equation

An equation that has equal numbers of each type of atom on both sides, representing a chemical reaction.