Question

Dialysis treatment removes urea and other waste products from a patient's blood by diverting some of the blood flow externally through a machine called a dialyzer. The rate at which urea is removed from the blood (in mg/minute) is often well described by the equation: C(t)=(Ub)/(V )e^-b/tV where q is the rate of flow of blood through the dialyzer (in ml/minute); V is the volume of the patient's blood (in ml) and U is the amount of urea in the blood (in mg) at time t=0 Evaluate ∂C/∂V

Answer 1

Answer:

Pure water always consists of two hydrogen and one oxygen atom. These atoms are chemically bonded to each other. Also pure gold consists of gold atoms only. Table salt (sodium chloride) cannot be separated by physical means and has a constant chemical composition. Hence, all the above examples are pure substances.