Quantities Concepts
18 concepts · Grades 6-8, 9-12 · 20 prerequisite connections
This family view narrows the full chemistry map to one connected cluster. Read it from left to right: earlier nodes support later ones, and dense middle sections usually mark the concepts that hold the largest share of future work together.
Use the graph to plan review, then use the full concept list below to open precise pages for definitions, examples, formulas, and related mistake guides. That combination keeps the page useful for both human study flow and crawlable internal linking.
Concept Dependency Graph
Concepts flow left to right, from foundational to advanced. Hover to highlight connections. Click any concept to learn more.
Connected Families
Quantities concepts have 8 connections to other families.
All Quantities Concepts
Mole
The fundamental counting unit in chemistry, defined as exactly $6.022 \times 10^{23}$ particles (atoms, molecules, ions, or other entities).
Avogadro's Number
The defined number of particles in exactly one mole of any substance: $6.022 \times 10^{23}$.
Molar Mass
The mass in grams of exactly one mole of a substance, calculated by summing the atomic masses of all atoms in the chemical formula.
Stoichiometry
The branch of chemistry that uses balanced chemical equations and mole ratios to calculate the precise quantities of reactants consumed and products formed in chemical.
Limiting Reactant
The reactant that is completely consumed first in a chemical reaction, thereby determining the maximum amount of product that can be formed.
Theoretical Yield
The maximum amount of product that could be formed in a chemical reaction, calculated from the stoichiometry of the balanced equation using the limiting reactant.
Percent Yield
The ratio of the actual yield obtained in an experiment to the theoretical yield predicted by stoichiometry, expressed as a percentage.
Empirical Formula
The chemical formula that shows the simplest whole-number ratio of atoms of each element present in a compound, obtained by dividing all subscripts by their.
Molecular Formula
The chemical formula showing the actual number of atoms of each element in one molecule of a compound, as opposed to the empirical formula which.
Percent Composition
Percent composition is the percentage by mass of each element in a chemical compound.
Gas Laws
A set of mathematical relationships that describe how the pressure, volume, temperature, and amount (moles) of a gas are interconnected.
Boyle's Law
Boyle's law states that for a fixed amount of gas at constant temperature, pressure and volume are inversely related.
Charles's Law
Charles's law states that for a fixed amount of gas at constant pressure, volume is directly proportional to absolute temperature.
Avogadro's Law
Avogadro's law states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles.
Excess Reactant
The reactant that remains after a reaction stops because the limiting reactant has been used up.
Actual Yield
The amount of product actually obtained from a reaction in the lab or in an industrial process.
Atomic Mass
The weighted average mass of all naturally occurring isotopes of an element, expressed in atomic mass units (amu), where each isotope's mass is weighted by.
Grams (Mass)
A gram (g) is the fundamental unit of mass in chemistry, defined as one thousandth of a kilogram.