MW (PO4) = 95 g/mol, MW (P) = 31 g/mol, MW (Mg2+) = 24 g/mol, MW (NH4+) = 18 g/mol. = = = Humans produce 0.8 1.6 L of urine per day. The annual mass of phosphorus in this urine on a per capita basis ranges from 0.2 to 0.4 kg P per person. What is the maximum concentration of phosphorus in human urine in g PO4/L