The Number of Counties in California Changes About Every 20

question 82

True/False

The number of counties in California changes about every 20 years to accommodate population change.

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Definitions:

Doublet

An NMR signal that is split into two peaks of equal intensity, indicating the presence of a neighboring proton with a spin-spin coupling effect.

NMR

Nuclear magnetic resonance, a spectroscopic technique used to observe the local magnetic fields around atomic nuclei, valuable in structural determination of molecules.

IR

Infrared, a region of the electromagnetic spectrum used in spectroscopy to identify molecular vibrations and thereby determine the presence of specific functional groups in a sample.

Septet

A splitting pattern in NMR spectroscopy indicating seven adjacent hydrogens.