molar mass
Chemistry's conversion factor
Molar mass is the mass of one mole of a substance, expressed in grams per mole.
It equals the sum of atomic masses of all atoms in a molecule: water's molar mass is about 18 g/mol.
The concept bridges the molecular scale to laboratory quantities, letting chemists convert between particle counts and measurable weights: Calculate the molar mass to determine how much reagent you need.
Fixed method or notation
- equationMathematical equality assertion
- atomic weightElement's average isotope mass
- conversionAct of changing states
- significant figuresDigits indicating measurement precision
precision · accuracy · quantitative · proportionality · arithmetic · computation · unit conversion · summation
Entities in one mole
- reactantsSubstances entering a reaction
- productsItems made for sale
- balanced equationFormula with conserved atoms
- coefficientsNumerical multipliers in expressions
Metric mass unit
- kilogramBase unit of mass
- milligramOne-thousandth gram
- microgramMillionth of a gram
- precisionAccuracy of measurement
weighing · quantify · density · scale · metric · calibration · tare
Element's average isotope mass
- isotopesAtomic number twins
- periodic tableSystematic display of elements
- weighted averageMean adjusted by significance
- atomic numberProton quantity per nucleus
Very large molecule
- polymerLarge repeated-unit molecule
- monomerChain-forming molecule
- oligomerShort chain of monomers
- proteinFolded amino chain
polysaccharide · nucleic acid · lipid · peptide · biopolymer · subunit · dimer · trimer
formula
Fixed method or notation
- equationMathematical equality assertion
- atomic weightElement's average isotope mass
- conversionAct of changing states
significant figures · precision · accuracy · quantitative · proportionality · arithmetic · computation · unit conversion · summation
Avogadro's number
Entities in one mole
- reactantsSubstances entering a reaction
- productsItems made for sale
- balanced equationFormula with conserved atoms
gram
Metric mass unit
precision · weighing · quantify · density · scale · metric · calibration · tare
atomic weight
Element's average isotope mass
- isotopesAtomic number twins
- periodic tableSystematic display of elements
- weighted averageMean adjusted by significance
macromolecule
Very large molecule
protein · polysaccharide · nucleic acid · lipid · peptide · biopolymer · subunit · dimer · trimer
- chemistryatom, atoms, organic chemistry, chemistry, elements
- element propertiesatomic number, atomic weight, symbol, electronegativity, melting point
- Atomic Massweighted average
- Chemical Theoryatomic theory, kinetic theory, quantum theory, ligand field theory, quantum chemistry
- gas physicsideal gas law, Boyle's law, Avogadro's law, gas laws, kinetic theory
- molar quantitiesnanomole
molar massatomic mass
Weighted average of isotopes
atomic weight · atomic mass unit · molecular mass · molecular weight
molar massatomic number
Proton quantity per nucleus
charge · molarity · electronegativity · oxidation state · valence
mass, mole, massive, moles, molecule, molar, molecular, molecules, molarity