calculate the total nitrogen (TN) of a solution containing 30 mg/L C2H5O2N, 100 mg/L NaNO3 and 50 mg/L NH4CL.
please explain clearly ... thank you so much
nitrogen in C2H5O2N is 14/75 and in NaNO3 is 14/85 and in NH4Cl is 14/53.5.so total nitrogen is30 mg/L*（14/75）+ 100 mg/L*（14/85）+ 50 mg/L*（14/53.5）= 35.15 mg/L
