If a Star's Measured Parallax Is 0

question 43

Multiple Choice

If a star's measured parallax is 0.2 arcsec, what is its distance?

• A) 2 pc
• B) 5 pc
• C) 20 pc
• D) 40 pc
• E) 50 pc

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Definitions:

Reagents

Substances or compounds added to a system to cause a chemical reaction.

Conjugated π-network

A system where alternating single and double bonds allow electrons to be delocalized across the structure, affecting the molecule's color and reactivity.

C O Stretch

Refers to the stretching vibration of a carbonyl group (C=O) in an infrared spectroscopy analysis.

Soluble

The ability of a substance to dissolve in a solvent, forming a homogenous mixture at a specified temperature and pressure.