Your Body deals with excess nitrogen by excreting it in the form of Urea, NH2CONH2. The reaction producing it is the combination of Arginine (C6H14N4O2) with water to give urea and ornithine(C5H12N2O2).
C6H14N4O2 +H2O --> NH2CONH2 +C5H12N2O2
if you excrete 95 mg of urea, what quantity of arganine must havebeen used? what quantity of ornithine must have been produced?