On Greg's last visit to his doctor, he complained of feeling tired. His doctor orders a blood test for iron. Sandra, the registered nurse, does a venipuncture and withdraws 8.0 mL of blood. About 70% of the iron in the body is used to form hemoglobin, which is a protein in the red blood cells that carries oxygen to the cells of the body. About 30% is stored in ferritin, bone marrow, and the liver. When the iron level is low, a person may have fatigue and decreased immunity. The normal range for serum iron in men is 80 to 160 mcg/dL. Greg's iron test showed a blood serum iron level of 42 mcg/dL, which indicates that Greg has iron deficiency anemia. His doctor orders an iron supplement to be taken twice daily (b.i.d.). One tablet of the iron supplement contains 110 mg of iron. Each tablet contains 110 mg of iron, which is given for iron supplementation. You may want to reference (Pages 49-52) Section 2.7 while Part C How many grams of iron will Greg consume in one week? Express the mass in grams to two significant figures. Provide Feedback

Q2

Determine the Oxidizing and Reducing Agent in the reactions below:3 Cl2(g) + 2 Fe(s) → 6 Cl– (aq) + 2 Fe3+(aq)Oxidizing Agent:Reducing Agent:Zn2+(aq) + NH4+(aq) → Zn(s) + NO3– (aq) Oxidizing Agent:Reducing Agent:

Ni (s) + Cu,SO, (aq) >

21. Nitric acid is manufactured in the Oswald process, which involves the catalytic oxidation of ammonia according to the following equations: (i) 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) (ii) 2 NO(g) + O2(8) 2 NO2(g); (iii) 3 NO2(g) + H2O(1) → 2 HNO3(aq) + NO(g); (NO is fed back into the second reactor) (a) The above equations may be combined to yield the following equation. Balance this equation. NH3(g) +_O2(g) + _H2O(1) _HNO3(1) + _H,O(1) + NO(g) (b) What is the mole fraction of NH3 that becomes nitric acid in one reaction cycle? (c) How many kilograms of HNO3 will be produced in one reaction cycle from 1.00 m³ of NH3, measured at STP, if the overall yield is 92.0%? (d) If concentrated nitric acid contains 70.0% (by mass) of HNO3 and the solution has density of 1.48 g/mL, how many litters of concentrated nitric acid is produced in this process at the above reaction yield? (Answers: (b) 2/3; (c) 1.73 kg of HNO3; (d) 1.67 L)