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Results for “Mole”

12 terms


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Analytical Chemistry & Spectroscopy

Raman Spectroscopy

A vibrational technique based on the small shift in frequency of light scattered inelastically by molecules.

Δν̃ = ν̃_incident − ν̃_scattered cm⁻¹
Solutions & Colligative Properties

Raoult's Law

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 Pa
States of Matter & Gas Laws

Real Gas

An actual gas whose behaviour deviates from the ideal gas law because its molecules occupy volume and attract one another.

Z = pV / nRT ≠ 1 Dimensionless
Stoichiometry & Chemical Reactions

Rearrangement Reaction

A reaction in which the atoms of a molecule are reorganised to give a structural isomer.

A → A′ (isomer) Dimensionless
Chemical Bonding & Molecular Structure

Resonance

The description of a molecule whose true structure is a weighted average of two or more valid Lewis structures.

A ↔ B ↔ C Dimensionless
Chemical Bonding & Molecular Structure

Resonance Energy

The extra stability a molecule gains from electron delocalisation, measured against the most stable single Lewis structure.

ΔE_res = E(hybrid) − E(best structure) kJ/mol
States of Matter & Gas Laws

Root Mean Square Speed

The square root of the average of the squared molecular speeds in a gas sample.

c_rms = √(3RT / M) m/s
Organic Chemistry

Racemic Mixture

An equimolar mixture of two enantiomers, which shows no net optical rotation.

50:50 (+) and (−) degrees
Nuclear & Radiochemistry

Radiopharmaceutical

A radioactive compound administered to a patient for diagnosis or treatment.

MBq
Chemical Equilibrium

Relationship between Kp and Kc

The conversion linking the pressure and concentration forms of the equilibrium constant for a gaseous reaction.

Kp = Kc(RT)^Δn Dimensionless
Solutions & Colligative Properties

Relative Lowering of Vapour Pressure

The fractional reduction in a solvent's vapour pressure caused by dissolving a non-volatile solute.

(p° − p) / p° = x_solute Dimensionless
Biochemistry & Polymer Chemistry

RNA

A generally single-stranded nucleic acid that carries out the expression of genetic information.

Dimensionless