17. Consider the information provided about the average concentration of CH4 in Mars's atmosphere. If Mars's atmosphere had a volume of 10 billion liters, how many liters of CH4 would be present in Mars's atmosphere?
Your Answer is
Correct Answer is A
Explanation
According to the second line of the first paragraph of the article, the average concentration is 10 ppbv (here pay attention to carefully read the definition of ppbv), so the content of methane should be 10 ppbv×10 billion liters=100 liters