Mole Relationships in Chemical Equations

This collection of flashcards covers key vocabulary and definitions related to mole relationships in chemical equations for exam preparation.

Law of Conservation of Mass

Matter cannot be created or destroyed; total mass remains constant in a chemical reaction.

Balanced Equation

An equation where the number of atoms for each element is the same on both sides.

Avogadro's Number

6.02 × 10²³; the number of atoms, molecules, or particles in one mole of a substance.

Reactants

The starting materials in a chemical reaction that undergo change.

Products

The substances formed as the result of a chemical reaction.

Moles

A unit of measurement in chemistry representing 6.02 × 10²³ entities (atoms, molecules, etc.).

Fe2S3

Iron(III) sulfide, the product formed when iron reacts with sulfur.

Chemical Reaction Example

2Fe(s) + 3S(s) → Fe2S3(s) demonstrates conservation of mass.

Molar Mass of Ag2S

247.9 g; the mass of one formula unit of silver sulfide.