ch6rev.pdf - Review Problems Exam 2 Chemistry 1127 Dr Neth...

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Review Problems Exam 2 Chemistry 1127 Dr. Neth 1. Myoglobin stores oxygen for metabolic processes in muscle tissue. Chemical analysis shows it contains 0.34% iron by mass. If there is one iron atom per myoglobin molecule, what is the molar mass of myoglobin? 2. Ibuprofen is composed of 75.69% C, 8.80 % H and oxygen. What is its simplest formula? 3. Phosphorus is obtained primarily from ores containing calcium phosphate. If a particular ore is 57.7% calcium phosphate, what is the minimum mass of ore that must be processed to obtain 1.00 kg of phosphorus? 4. What is the molarity of a solution prepared by diluting 35.0 g of potassium chromate to a total volume of 2.00 L? What volume of the solution must be taken such that it contains 0.0015 mol of potassium chromate? 5. A compound X contains 63.3% Mn and 36.7% O by mass. When X is heated, O 2 gas is evolved and a new compound Y forms, which contains 72.0% Mn and 28.0 % O by mass.
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