Chemistry, 02.09.2019 19:10 zitterkoph
The us environmental protection agency (epa) places limits on the quantities of toxic substances that may be discharged into the sewer system. limits have been established for a variety of substances including hexavalent chromium which is limited to 0.50 mg/l .if an industry is discharging hexavalent chromium as potassium dichromate (k2cr2o7), what is the maximum permissible molarity of that substance?
Answers: 3
Chemistry, 21.06.2019 14:30
Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.
Answers: 1
Chemistry, 21.06.2019 18:00
Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon
Answers: 1
Chemistry, 22.06.2019 12:10
|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions.what elemental classification does oxygen belongto? done
Answers: 3
The us environmental protection agency (epa) places limits on the quantities of toxic substances tha...
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