1.

An aqueous solution with sulfur 10 g/L at the rate is 100 L/min and an organic compound with no sulfur at the rate 50 L/min were put into an extraction machine and produced aqueous solution with sulfur 1 g/L, what is the amount of sulfur in organic compound after extraction?

A. 2 g/L
B. 5 g/L
C. 9 g/L
D. 15 g/L
Answer» D. 15 g/L


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