Find the mass in kilograms of a giant molecular cloud that is 30 pc in diameter and has a density of 300 hydrogen molecules/cm3. (Hint: See Problem 7.)
REFERENCE:
An H I cloud is 4 pc in diameter and has a density of 100 hydrogen atoms/cm3. What is its total mass in kilograms? (Note: The volume of a sphere is and the mass of a hydrogen atom is 1.67 × 10-27 kg.)
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