A particular giant molecular cloud has a mass of 400,000 solar masses.What is the mass of helium in this cloud?
A) 4000 solar masses
B) 300,000 solar masses
C) 392,000 solar masses
D) 100,000 solar masses

Question

Quizplus · Accepted Answer

In a typical giant molecular cloud, helium accounts for about 25% of the mass. Therefore, for a cloud with 400,000 solar masses, the mass of helium would be 25% of 400,000, which equals 100,000 solar masses.

A Particular Giant Molecular Cloud Has a Mass of 400,000