Results for “Mole”
256 terms · page 10 of 11
Physical Change
A change that alters the form or state of a substance while leaving its chemical composition intact.
Chemical Bonding & Molecular StructurePi Bond
A covalent bond formed by the sideways overlap of parallel p orbitals, with electron density above and below the internuclear axis.
Acids, Bases & SaltspKa
The negative logarithm of the acid dissociation constant, giving a convenient scale of acid strength.
Chemical Bonding & Molecular StructurePolar Covalent Bond
A covalent bond in which the shared electrons are unequally distributed because the bonded atoms differ in electronegativity.
Solutions & Colligative PropertiesPositive Deviation
Behaviour in which a solution exerts a higher vapour pressure than Raoult's law predicts.
Stoichiometry & Chemical ReactionsPyrolysis
The thermal decomposition of a substance at high temperature in the absence of oxygen.
Organic ChemistryRacemic Mixture
An equimolar mixture of two enantiomers, which shows no net optical rotation.
Nuclear & RadiochemistryRadiopharmaceutical
A radioactive compound administered to a patient for diagnosis or treatment.
Chemical EquilibriumRelationship between Kp and Kc
The conversion linking the pressure and concentration forms of the equilibrium constant for a gaseous reaction.
Solutions & Colligative PropertiesRelative Lowering of Vapour Pressure
The fractional reduction in a solvent's vapour pressure caused by dissolving a non-volatile solute.
Biochemistry & Polymer ChemistryRNA
A generally single-stranded nucleic acid that carries out the expression of genetic information.
Organic ChemistrySaturation and Unsaturation
The distinction between compounds containing only single bonds and those containing multiple bonds or rings.
Atomic Structure & PeriodicitySchrödinger Wave Equation
The fundamental equation of quantum mechanics whose solutions give the allowed energies and wavefunctions of a system.
Chemical Kinetics & CatalysisSecond-Order Reaction
A reaction whose rate depends on the square of one concentration or on the product of two concentrations.
Inorganic & Coordination ChemistrySecondary Valence
In Werner's theory, the non-ionisable valence corresponding to the coordination number, satisfied by ligands in fixed spatial positions.
Chemical Kinetics & CatalysisSelectivity
The ability of a catalyst to direct a reaction towards one particular product among several possible ones.
Foundations of ChemistrySI Base Units
The seven defined units of the International System from which every other measurement unit is derived.
States of Matter & Gas LawsSolid State
The state of matter in which particles are held in fixed positions, giving a definite shape and volume.
Solutions & Colligative PropertiesSolubility of Gases
The amount of a gas that dissolves in a given volume of liquid at a stated temperature and partial pressure.
Solutions & Colligative PropertiesSolvent
The component of a solution present in the greater amount, which dissolves and disperses the solute.
Thermochemistry & ThermodynamicsSpecific Heat Capacity
The heat required to raise the temperature of one kilogram of a substance by one kelvin.
Chemical Bonding & Molecular Structuresp³ Hybridisation
The mixing of one s and three p orbitals to give four hybrid orbitals directed towards the corners of a tetrahedron.
Chemical Kinetics & CatalysisSteric Factor
The fraction of sufficiently energetic collisions that also have the correct spatial orientation for reaction.
Stoichiometry & Chemical ReactionsStoichiometric Coefficient
The number written before a formula in a balanced equation, giving the relative amount of that substance consumed or produced.