The concentration of sulfur dioxide in a sample of polluted air is 0.4 ppm . What is the percentage of sulfur dioxide molecules in this polluted air?
A.
0.4\%
B.
0.004\%
C.
0.00004\%
D.
0.0000004\%
Exam No：wch11-01-que-20240111 Year：2024 Question No：13
Answer:
C
Knowledge points:
1.Formulae, Equations and Amount of Substance
Solution:
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