Chemical Composition Overview

Set of vocabulary flashcards designed to help students understand key terms and concepts related to chemical composition and mole calculations.

Sodium

An essential dietary mineral, primarily consumed as sodium chloride (table salt), that helps regulate body fluids.

Sodium Chloride (NaCl)

A chemical compound composed of sodium ions and chloride ions, commonly known as table salt.

FDA Recommendation

Less than 2.4 g (2400 mg) of sodium per day is the recommended intake according to the Food and Drug Administration.

Mole (mol)

A unit used in chemistry to represent 6.022 × 10²³ atoms, ions, or molecules.

Avogadro's Number

6.022 × 10²³, the number of units (atoms, molecules, etc.) in one mole of a substance.

Atomic Mass Unit (amu)

A unit of mass used to express atomic and molecular weights, defined as one-twelfth the mass of a carbon-12 atom.

Molar Mass

The mass of one mole of a substance, expressed in grams per mole (g/mol).

Empirical Formula

The simplest whole-number ratio of elements in a compound.

Mass Percent Composition

The percentage by mass of each element in a compound, calculated as the mass of that element divided by the total mass of the compound.

Conversion Factor

A ratio used to express a quantity in different units, derived from a chemical formula or a known relationship.

Chemical Formula

A representation of a compound that indicates the types and numbers of atoms present.

Formula Mass

The sum of the atomic masses of all the atoms in a chemical formula.

Percent by Mass

A way to express the concentration of a component in a mixture, usually as a percentage of the total mass.

Number of Atoms in a Sample

Calculated by converting grams to moles, then using Avogadro's number.