Multiple Choice
How have complex molecules such as formaldehyde (H2CO) been detected in interstellar clouds?
A) by direct sampling by space probes
B) by observing the chemical reactions in which they are created
C) only by theoretical modeling since it is known that the component elements (H, C, O) are present in space
D) by molecular emission lines
Correct Answer:
Verified
Correct Answer:
Verified
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