What is the primary component of an exhaled breath?
A) N2
B) O2
C) CO2
D) H2O
Correct Answer:
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Q12: Air is a(n)
A)element.
B)compound.
C)mixture.
D)pure substance.
Q13: Which substance is not considered to be
Q14: Based on its name,which carbon compound contains
Q15: In general,which airborne material is not likely
Q16: All of these pollutants can be detected
Q18: Which component of the air makes up
Q19: The burning of coal produces sulfur dioxide,SO2,a
Q20: Which pollutant is present in air as
Q21: Which of the following are examples of
Q22: If 500 mL of air contains 2
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