What is the most abundant molecule in interstellar clouds besides molecular hydrogen?
A)carbon monoxide
B)water
C)ammonia
D)methane
E)molecular helium

Question

Quizplus · Accepted Answer

Carbon monoxide (CO) is the most abundant molecule in interstellar clouds besides molecular hydrogen (H2). It can be easily detected through its rotational transitions and is often used as a tracer for molecular gas in interstellar space. Water (H2O) and ammonia (NH3) are also common in interstellar clouds, but they are less abundant than CO. Methane (CH4) and molecular helium (He2) are rare in interstellar clouds.

What Is the Most Abundant Molecule in Interstellar Clouds Besides