Philippine Toxic and Hazardous Wastes Act places limits on the quantities of toxic substances that may be discharged into the sewerage system. Guidelines on hexavalent chromium (Cr6+) limits the discharge amount to just 0.50 mg/L. If an industry dumps hexavalent chromium in the form of potassium dichromate (K2Cr2O7), what is the maximum allowable concentration of hexavalent chromium in moles per liter of sewage water?

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