Multiple Choice
What is the concentration (ppm) of helium in the atmosphere if the mole fraction of helium in dry air near sea level is 0.00000524?
A) 5.24
B) 1.91 × 1011
C) 5.24 × 10-4
D) 5240
E) 5.24 × 10-12
Correct Answer:
Verified
Correct Answer:
Verified
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