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Leader: Course: Instructor: Date: Final Review 1 Supplemental Instruction Iowa State University 1: a) b) c) d) e) Define: Molarity Specific heat Endothermic reaction Exothermic reaction Limiting reactant 2: Balance the following equations: 3: Carlie Chem 177 Schewe-Miller 4-23-12 NH3 KNO3 B2Br6 BF3 (NH4)3PO4 + + + + + O2 H2CO3 HNO3 Li2SO3 Pb(NO3)4 NO K2CO3 B(NO3)3 B2(SO3)3 Pb3(PO4)4 + + + + + H2O HNO3 HBr LiF NH4NO3 Convert 9.80g of CH3 CH2OH to number of molecules of CH3 CH2OH. 4: A compound has an empirical formula of CH2 and is found to have a molecular weight of 21,000 g/mol, what is its molecular formula? 5: I have 2.5 moles of table salt (NaCl) in a solution that is 1.5 M. What volume of solution do I have? 6: My cast iron skillet, that weighs 4 kg, needs go be heated from room temperature (22oC) to 150 oC. How much heat is required? ciron = 0.46 J/gC Supplemental Instruction 1060 Hixson-Lied Student Success Center 294-6624 www.si.iastate.edu 7: For the following reaction What is reduced? What is oxidized? Cu(s) + 4HNO3(aq) Cu(NO3)2(aq) + 2H2O(l) + 2NO2(g) 8A: Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. Write the Balance Chemical Equation. Write the Net Ionic Equation. What is the molarity of the NaOH solution? 9: If 20.0 g of solid NaOH are added to 1000 mL of a solution containing 0.500 moles of HCl, the temperature of the solution rises 6.9oC. Assuming that the total solution mass is 1000 g and the specific heat of the solution is 4.184 J/goC, calculate the heat released by this reaction. Then calculate ΔHrxn (i.e., the heat released per mole of NaOH). 10: What is the specific heat of a substance that absorbs 2.5 x 103 joules of heat when a sample of 1.0 x 104 g of the substance increases in temperature from 10.0C to 70.0C? 12:Aluminum reacts with an aqueous soluteon containing excess copper (II) sulfate. If 1.85 g Al reacts and the percentage yield of Cu is 56.6%, what mass of Cu is produced?