Unit 1: Moles and Molar Mass Flashcards

Vocabulary flashcards covering key definitions, mathematical formulas, and constants from Unit 1 Topic 1.1 Moles and Molar Mass.

The Mole

The amount of substance containing the same number of discrete entities (atoms, molecules, ions, etc.) as the number of atoms in a sample of pure $^{12}\text{C}$ weighing exactly $12\,\text{g}$.

Atomic Mass Unit (amu)

A unit of measurement for atomic masses based on $\frac{1}{12}\text{th}$ of a Carbon-12 ($^{12}\text{C}$) atom's mass.

Avogadro's Number ($N_A$)

The number of particles in $1\,\text{mol}$ of a substance, equal to $6.022 \times 10^{23}$ items.

Molar Mass

The mass of $1\,\text{mol}$ of a substance, measured in $\text{g\,mol}^{-1}$.

Conversion Factor

A ratio which represents the relationship between the same quantity in two different units, always equal to 1.

Number of Moles Equation

The formula $n = \frac{m}{M}$, where $n$ is the number of moles, $m$ is the mass of the sample, and $M$ is the molar mass.