The Bright Stars at the Center of an Emission Nebula

question 153

Multiple Choice

The bright stars at the center of an emission nebula (H II region) are

• A) young O stars and B stars.
• B) red supergiants.
• C) hot white dwarfs.
• D) T Tauri stars.

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Definitions:

NMR Spectrum

A representation of the nuclear magnetic resonance of a molecule, providing detailed information about the structure, dynamics, reaction state, and chemical environment of molecules.

Signals

In spectroscopy, indications or peaks that represent the interaction of energy with matter, used to identify or quantify materials.

Bromochlorobenzoic Acid

A halogenated derivative of benzoic acid where both a bromine and chlorine atom are attached to the benzene ring, used in various chemical syntheses.

Structure

The arrangement or organization of parts to form a whole, commonly used in chemistry to describe the molecular arrangement of compounds.