Search results for “Mole”

Homogeneous Mixture Foundations of Chemistry Dimensionless A mixture whose composition and properties are uniform throughout, with no visible boundary between the components.

Hückel's Rule Organic Chemistry Dimensionless The rule that a planar cyclic conjugated system is aromatic if it contains 4n + 2 pi electrons. 4n + 2 π electrons

Integration in NMR Analytical Chemistry & Spectroscopy Dimensionless The measurement of the area under each NMR signal, which is proportional to the number of nuclei giving rise to it. area ∝ number of nuclei

Internal Energy Thermochemistry & Thermodynamics J The total kinetic and potential energy of all the particles within a system. ΔU = q + w

Ionic Bond Chemical Bonding & Molecular Structure kJ/mol The electrostatic attraction between oppositely charged ions formed by the complete transfer of electrons from one atom to another. F ∝ q₁q₂ / r²

Isoelectronic Species Atomic Structure & Periodicity Dimensionless Atoms or ions that possess the same number of electrons and the same electron configuration.

Joule–Thomson Effect States of Matter & Gas Laws K/Pa The temperature change of a real gas when it expands through a throttle without exchanging heat or doing external work. μ = (∂T/∂p)_H

Langmuir Adsorption Isotherm Chemical Kinetics & Catalysis Dimensionless A model describing monolayer adsorption on a surface with a fixed number of equivalent, independent sites. θ = Kp / (1 + Kp)

Latent Heat States of Matter & Gas Laws kJ/kg The energy absorbed or released when a substance changes state, with no accompanying change in temperature. q = m × L

Law of Definite Proportions Foundations of Chemistry Dimensionless The principle that a given chemical compound always contains its constituent elements in the same fixed mass ratio.

Like Dissolves Like Solutions & Colligative Properties Dimensionless The empirical rule that substances dissolve best in solvents with similar polarity and bonding character.

Limiting Reagent Stoichiometry & Chemical Reactions mol The reactant that is completely consumed first and therefore determines the maximum amount of product obtainable. smallest n / coefficient

Liquid State States of Matter & Gas Laws Dimensionless The state of matter with a definite volume but no fixed shape, in which particles are close together yet free to move past one another.

Lone Pair Chemical Bonding & Molecular Structure Dimensionless A pair of valence electrons localised on one atom and not involved in bonding.

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

Metabolism Biochemistry & Polymer Chemistry kJ/day The complete set of chemical reactions occurring within a living organism.

Miscibility Solutions & Colligative Properties Dimensionless The ability of two liquids to mix in all proportions to form a single homogeneous phase.

Molar Conductivity Electrochemistry & Redox S·cm²/mol The conductivity of a solution divided by the molar concentration of the electrolyte. Λm = κ / c

Negative Deviation Solutions & Colligative Properties Pa Behaviour in which a solution exerts a lower vapour pressure than Raoult's law predicts. p < x p°

Nucleotide Biochemistry & Polymer Chemistry Dimensionless The monomer of nucleic acids, consisting of a nitrogenous base, a five-carbon sugar and a phosphate group.

Partial Pressure States of Matter & Gas Laws Pa The pressure that one component of a gas mixture would exert if it alone occupied the whole volume. p_i = x_i × p_total

Phenolphthalein Acids, Bases & Salts Dimensionless An acid–base indicator that is colourless in acid and pink in alkaline solution, changing between pH 8.3 and 10.0. C₂₀H₁₄O₄

Phospholipid Biochemistry & Polymer Chemistry Dimensionless A lipid in which one fatty acid of a triglyceride is replaced by a phosphate-containing group.

Photosynthesis Biochemistry & Polymer Chemistry kJ/mol The process by which plants use light energy to convert carbon dioxide and water into carbohydrate and oxygen. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Results for “Mole”