The commercial production of nitric acid involves the
following
4 NH31g2 + 5 O21g2¡4 NO1g2 + 6 H2O1g2
2 NO1g2 + O21g2¡2 NO21g2
3 NO21g2 + H2O1l2¡2 HNO31aq2 + NO1g2
(a) Predict what kind of reaction dopamine is most likely to
undergo in water: redox, acid-base, precipitation, or metathesis?
Explain your reasoning. (b) Patients with Parkinson’s
disease suffer from a shortage of dopamine and may need to
take it to reduce symptoms. An IV (intravenous fluid) bag is
filled with a solution that contains 400.0 mg dopamine per
250.0 mL of solution. What is the concentration of dopamine
in the IV bag in units of molarity? (c) Experiments with
rats show that if rats are dosed with 3.0 mg/kg of cocaine
(that is, 3.0 mg cocaine per kg of animal mass), the concentration
of dopamine in their brains increases by 0.75 mM after
60 seconds. Calculate how many molecules of dopamine
would be produced in a rat (average brain volume 5.00 mm3)
after 60 seconds of a 3.0 mg/kg dose of cocaine.
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