Search results for “Mole”

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⁻

Non-Ideal Solution Solutions & Colligative Properties Pa A solution that departs from Raoult's law because interactions between unlike molecules differ from those between like molecules. p ≠ x p°

Nuclear Magnetic Resonance Spectroscopy Analytical Chemistry & Spectroscopy MHz A technique that probes molecular structure using the resonance of atomic nuclei in a strong magnetic field. ν = γB₀ / 2π

Optical Isomerism Organic Chemistry degrees Stereoisomerism in which molecules are non-superimposable mirror images and rotate plane-polarised light in opposite directions.

Osmosis Solutions & Colligative Properties Dimensionless The net movement of solvent molecules through a semipermeable membrane from a dilute to a concentrated solution.

Photochemical Quantum Yield Chemical Kinetics & Catalysis Dimensionless The number of molecules reacting for each photon of light absorbed by the system. Φ = molecules reacted / photons absorbed

Photochemical Reaction Stoichiometry & Chemical Reactions nm A reaction initiated by the absorption of light, which promotes a molecule to an electronically excited state. A + hν → A*

Physisorption Chemical Kinetics & Catalysis kJ/mol Weak adsorption in which molecules are held to a surface by van der Waals forces alone. ΔH ≈ −20 to −40 kJ/mol

Polarisability Chemical Bonding & Molecular Structure C·m²/V The ease with which the electron cloud of an atom, ion or molecule can be distorted by an external electric field. μ_induced = α × E

Polymer Biochemistry & Polymer Chemistry g/mol A large molecule built from many repeating structural units joined by covalent bonds. –(A)ₙ–

Polyprotic Acid Acids, Bases & Salts mol/L An acid capable of donating more than one proton per molecule. H₂A ⇌ H⁺ + HA⁻ ⇌ 2H⁺ + A²⁻

Protein Biochemistry & Polymer Chemistry g/mol A large biomolecule made of one or more chains of amino acids folded into a specific three-dimensional shape.

Raman Spectroscopy Analytical Chemistry & Spectroscopy cm⁻¹ A vibrational technique based on the small shift in frequency of light scattered inelastically by molecules. Δν̃ = ν̃_incident − ν̃_scattered

Raoult's Law Solutions & Colligative Properties Pa The partial vapour pressure of each component of an ideal solution equals its mole fraction times its pure vapour pressure. p_A = x_A p°_A

Real Gas States of Matter & Gas Laws Dimensionless An actual gas whose behaviour deviates from the ideal gas law because its molecules occupy volume and attract one another. Z = pV / nRT ≠ 1

Rearrangement Reaction Stoichiometry & Chemical Reactions Dimensionless A reaction in which the atoms of a molecule are reorganised to give a structural isomer. A → A′ (isomer)

Resonance Chemical Bonding & Molecular Structure Dimensionless The description of a molecule whose true structure is a weighted average of two or more valid Lewis structures. A ↔ B ↔ C

Resonance Energy Chemical Bonding & Molecular Structure kJ/mol The extra stability a molecule gains from electron delocalisation, measured against the most stable single Lewis structure. ΔE_res = E(hybrid) − E(best structure)

Root Mean Square Speed States of Matter & Gas Laws m/s The square root of the average of the squared molecular speeds in a gas sample. c_rms = √(3RT / M)

Self-Ionisation of Water Acids, Bases & Salts mol/L The reaction in which two water molecules transfer a proton to give a hydronium and a hydroxide ion. 2H₂O ⇌ H₃O⁺ + OH⁻

Results for “Mole”