A198-lb patient is to receive a dobutamine infusion at 5 mcg/kg/minute. the label on the infusion bag states: dobutamine 250 mg in 250 ml normal saline. when setting the infusion pump, the nurse will set the infusion rate at how many ml per hour

The ideal response for this situation is in order to administer the dobutamine at the recommended rate of 5 mcg/kg/minute from a concentration of 250 mg in 250 mL, the nurse will need to require to infuse a 27 mL/hour in setting up the infusion pump. 

"d.) carbon dioxide and hydrogen sulfide"

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?