A Mass-To-Light Ratio for a Galaxy of Much Greater Than

question 11

Multiple Choice

A mass-to-light ratio for a galaxy of much greater than one indicates that

• A) the galaxy is very massive.
• B) the galaxy is not very massive.
• C) on average, each solar mass of matter in the galaxy emits much less light than our Sun.
• D) on average, each solar mass of matter in the galaxy emits much more light than our Sun.
• E) most stars in the galaxy are more massive than our Sun.

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Definitions:

MgBr

Magnesium bromide, a chemical compound used as a reagent in organic synthesis, particularly in Grignard reactions.

7-Methyl-2-octanone

A ketone where the ketone group is positioned at the second carbon of an octane chain that has a methyl group attached to its seventh carbon.

Reagents

Agents or compounds inserted into a system with the purpose of starting a chemical reaction or assessing whether a reaction takes place.

Heptanoic Acid

A saturated fatty acid with the chemical formula C7H14O2, known for its odorous characteristic and usage in the synthesis of esters for fragrances.