Search results for “Mole”

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)

Racemic Mixture Organic Chemistry degrees An equimolar mixture of two enantiomers, which shows no net optical rotation. 50:50 (+) and (−)

Radiopharmaceutical Nuclear & Radiochemistry MBq A radioactive compound administered to a patient for diagnosis or treatment.

Relationship between Kp and Kc Chemical Equilibrium Dimensionless The conversion linking the pressure and concentration forms of the equilibrium constant for a gaseous reaction. Kp = Kc(RT)^Δn

Relative Lowering of Vapour Pressure Solutions & Colligative Properties Dimensionless The fractional reduction in a solvent's vapour pressure caused by dissolving a non-volatile solute. (p° − p) / p° = x_solute

RNA Biochemistry & Polymer Chemistry Dimensionless A generally single-stranded nucleic acid that carries out the expression of genetic information.

Results for “Mole”