Find the Average Density of a Red Giant Star with a Mass

question 43

Multiple Choice

Find the average density of a red giant star with a mass of 20 × 10³⁰ kg (approximately 10 solar masses) and a radius of 150 × 10⁹ m (equal to the Earth's distance from the Sun) .

• A)1.41 × 10⁻⁴ kg/m³
• B)0.007 kg/m³
• C)1.41 kg/m³
• D)710 kg/m³
• E)1.41 × 10⁻³ kg/m³

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Definitions:

Ethanamine

An organic chemical compound, also known as ethylamine, with the formula CH3CH2NH2, classified as a primary amine.

Conjugate Base

The species that remains after an acid has donated a proton, often able to react by accepting a proton.

pKa Values

A quantitative measure that indicates the strength of an acid; it's the logarithmic constant of a compound's dissociation in water.

Acids

Substances that donate protons (H+) in a chemical reaction and have a pH less than 7 in an aqueous solution.