## Chemistry and Chemical Reactivity (9th Edition)

Number of moles of urea: $95\ mg\div 60.06\ mg/mmol=1.58\ mmol$, same as the others from stoichiometry. Mass of arginine: $1.58\ mmol\times 174.20\ mg/mmol=275.2\ mg$ Mass of ornithine: $1.58\ mmol\times 132.16\ mg/mmol=208.8\ mg$