jadbaubl1795 jadbaubl1795
  • 09-01-2024
  • Chemistry
contestada

Minimum chlorine residuals of ________ (free) and ________ (combined) are required in the far reaches of the distribution system.
a. 0.5/0.2
b. 5/2
c. 2/5
d. 0.2/0.5

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