If H(t) is the amount in (mg) of Heparin in a patient, at time t. The patient is being dosed at a rate of 4 mg/hour, and the Heparin is broken down with a half-life of 1.4 hours in the body. Which of the following is true? Hint: use the balance law: dH dt dH dt dH dt = 4-e - - dH - dt = Net rate of change = rate in rate out e-0.5t 4t - 0.5H 4 - 0.5H 4t-e-0.5t

The enzyme examase catalyses the following reaction, A - B where A is the reactant and B is the product A595 measurements were used to determine the catalytic activity of examase by measuring the rate at which B is produced. From this, the activity of the enzyme was determined to be 42 µmol/mL per minute. A standard albumin solution (concentration = 10 mg/mL) was used to prepare a standard curve of Abs595 vs amount of protein in mg. The protein assay was also performed using 100 uL of a 1 in 10 dilution of the original examase sample. For the absorbance measurements, it was determined that the sample used in the A595 measurement contains 1.2 mg of examase. Which of the following statements correctly gives the specific activity of examase? 1.0.35 U/mg O 2.0.035 U/mg 3. 5040 U/mg O 4.35 U/mg O 5.3.5 U/mg

Page 3. 5) The rate of reaction of hemoglobin (Hb) with carbon monoxide was studies at 20°C. The following data was collected, with all concentrations in units of 106 mol/L. a) Calculate the rate equation, including the value of the rate constant, from the data shown. [Hb]o [CO] o Initial Rate 2.21 1.00 0.619 4.42 1.00 1.24 4.42 3.00 3.71 b) What would be the rate for an experiment where the initial [HB] = 3.36 x 10-6 and [CO]o = 2.40 x 106 M

* In a certain culture where the rate of growth of bacteria is proportional to the number present, the number triples in 4 days. If at the end of 7 days there are 9 million bacteria present in the culture, how many were present initially? O 670,952 O 770,074 O 1,316,074 O 1,116,074

2) If the BOD5 of a waste is 220 mg/l and the ultimate BOD is 320 mg/l, what is the rate constant?

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Hi. Please see the attached image for the question! Question is in the photo attached. Please show work and answer question. Please just answer poll 1 in the image attached

Which of the following processes is nonspontaneous?     Ball rolls down an incline.     Radioisotopes decays.     Water boils at room temperature without an external energy source.     Water flows downhill.

A 125 mg dose of a drug is given at 6:00 AM. If the drug has a half life of 4.4 hours in the human blood stream find the following. a) How much of the drug is in the blood stream at 8:00 AM? b) How much of the drug is in the bloodstream at 8:00 PM?

25 20 15 B 10 C A Reaction progress Use the reaction energy diagram above to answer the following questions. Calculate the activation energy, AG * , for the step B to A. kcal/mol Calculate the overall energy change, AG°, for the process C to B. kcal/mol Which step is faster, (a) A to B or (b) C to B? Free Energy (kcal/mol)