jeremymorales336
jeremymorales336 jeremymorales336
  • 24-09-2020
  • Mathematics
contestada

Which of the following is the proper concentration of chlorine on non-porous surfaces?
O 100 ppm to 200 ppm
O 50 ppm to 150 ppm
O 600 ppm to 700 ppm
O 1,000 ppm to 2,000 ppm

Respuesta :

mooj55503 mooj55503
  • 04-10-2020

Answer:

600-700

Step-by-step explanation:

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