Search results for “Mole”

Mole Foundations of Chemistry mol The SI base unit for amount of substance, containing exactly 6.02214076 × 10²³ elementary entities. n = m / M

Mole Fraction Solutions & Colligative Properties Dimensionless The ratio of the moles of one component to the total moles of all components in a mixture. x_A = n_A / n_total

Mole Fraction Equilibrium Constant Chemical Equilibrium Dimensionless The equilibrium constant written in terms of the mole fractions of the reacting gases. Kx = Kp × p^(−Δn)

Mole Ratio Stoichiometry & Chemical Reactions Dimensionless The proportion between the amounts of any two substances in a reaction, taken directly from the balanced equation's coefficients. n_A : n_B = a : b

Molecular Equation Stoichiometry & Chemical Reactions Dimensionless A chemical equation in which all reactants and products are written as complete, undissociated formulae. AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

Molecular Formula Foundations of Chemistry Dimensionless The formula stating the actual number of atoms of each element present in one molecule of a compound. molecular formula = n × empirical formula

Molecular Geometry Chemical Bonding & Molecular Structure degrees The three-dimensional arrangement of the bonded atoms in a molecule, ignoring the positions of lone pairs.

Molecular Ion Peak Analytical Chemistry & Spectroscopy Da The peak in a mass spectrum corresponding to the intact molecule after loss of a single electron. M⁺·

Molecular Mass Foundations of Chemistry Dimensionless The sum of the relative atomic masses of all atoms shown in a molecular formula. M_r = Σ A_r (all atoms)

Molecular Orbital Theory Chemical Bonding & Molecular Structure Dimensionless The bonding model in which atomic orbitals combine to form molecular orbitals delocalised over the entire molecule. ψ_MO = c₁ψ_A ± c₂ψ_B

Molecularity Chemical Kinetics & Catalysis Dimensionless The number of reacting species that collide simultaneously in a single elementary step.

Molecule Foundations of Chemistry Dimensionless An electrically neutral group of two or more atoms held together by covalent bonds, acting as the smallest unit of a covalent substance.

Mass Spectrometry Analytical Chemistry & Spectroscopy Da A technique that separates ionised molecules and fragments according to their mass-to-charge ratio. m/z

Maxwell–Boltzmann Distribution States of Matter & Gas Laws Dimensionless The statistical distribution describing how molecular speeds are spread within a gas at a given temperature. f(v) ∝ v² e^(−mv² / 2kT)

Metal Carbonyl Inorganic & Coordination Chemistry Dimensionless A coordination compound in which carbon monoxide molecules are bonded to a metal centre. M(CO)ₙ

Micelle Solutions & Colligative Properties mol/L A spherical aggregate of surfactant molecules that forms in solution above a characteristic concentration.

Molality Solutions & Colligative Properties mol/kg The concentration of a solution expressed as moles of solute per kilogram of solvent. m = n / mass of solvent (kg)

Molar Heat Capacity Thermochemistry & Thermodynamics J/(mol·K) The heat required to raise the temperature of one mole of a substance by one kelvin. C_m = q / (nΔT)

Molar Mass Foundations of Chemistry g/mol The mass of one mole of a substance, numerically equal to its relative atomic or molecular mass expressed in grams. M = m / n

Molar Volume Foundations of Chemistry L/mol The volume occupied by one mole of a substance under stated conditions of temperature and pressure. V_m = V / n = RT / p

Molarity Solutions & Colligative Properties M (mol/L) The concentration of a solution expressed as moles of solute per litre of solution. M = n / V

Monomer Biochemistry & Polymer Chemistry g/mol The small molecule that repeats to form a polymer.

Monoprotic Acid Acids, Bases & Salts mol/L An acid that can donate only one proton per molecule. HA ⇌ H⁺ + A⁻

Matter Foundations of Chemistry kg Anything that occupies space and possesses rest mass, existing in the solid, liquid, gas or plasma state.

Results for “Mole”