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by: Peggie Leffler
Peggie Leffler
CSU Pomona
GPA 3.55


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Class Notes
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This 3 page Class Notes was uploaded by Peggie Leffler on Saturday October 3, 2015. The Class Notes belongs to CHM121 at California State Polytechnic University taught by EdwardWalton in Fall. Since its upload, it has received 16 views. For similar materials see /class/218227/chm121-california-state-polytechnic-university in Chemistry and Biochemistry at California State Polytechnic University.

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Date Created: 10/03/15
Name g3 Review Practice Final Exam CHEMISTRY 121 Which of the following is a not an element a iron b brass c steel d titanium e potassium Which of the following elements most closely behaves chemically like ca cium a sodium b argon c fluorine d barium e sulfur Which of the following elements is LEAST reactive a neon b iron c potassium d tin e calcium What is the mass of 025 moles of CaNO32 Which is the smallest atom aObNa on dA1 eS 50000 ml of water is added to 3500 mL of a 200 M solution of NaCl What is the Molarity of the new diluted solution What volume of 20 M HCl solution is required to completely neutralize 500 grams of KOH What is the number of electrons possible in the set of 3d orbital What is the percent oxygen in the sulfuric acid H2804 What is the number of electrons in the outer shell of phosphorus Balance the following equation H2 0 C gt CO2 H2 What is the oxidation number of Mn in KMnO4 What is the density of carbon monoxide gas at STP An engineer wishes to obtain Aluminum from a sample of bauxite A1203 What amount of aluminum in grams can she hope to obtain from 5000 grams of the bauxite 2A1203 3C a 4A1 3C02 The engineer needs to produce 125 Kilograms of ammonia by the reaction 2 3 H2 gt 2 NH3 This reaction gives only 70 yield What amount of nitrogen is needed to get that 125 Kg of ammonia at 70 yield 20 21 22 23 24 25 26 Name In the following reaction Zn 2 Mn02 2 H20 gt ZnOH2 2 MnOOH If a reaction mixture began with 1000 graIns of Zn 2000g of Mn02 and 500 g of water What is the limiting reagent What is the amount of ZnOH2 that can be produced What volume of 0150 M NaCl is needed to get 100 grams of NaCl What is the molar mass of a monoprotic acid if 0500 grams requires 300 mL of 0150 M NaOH to reach the endpoint in a titration Give the chemical formula or naIne as needed for the following a potassium carbonate b silver nitrate c lead H sulfide 1 calcium phosphate e aInmonium hydroxide Draw a quotBohrquot model picture of an oxygen atom Indicate the number on shells and the electrons in those shells Draw an s orbital and one of the quotpquot orbital Arrange the following according to increasing ionization energy Na K Mg Al Si S Ar Give the electronic structure for S Co What is the number of unpaired electrons in S What volume of carbon dioxide gas at 100 C and 2 atm pressure is needed to have 225g of carbon dioxide Draw the electron dot structure for the following Show any resonance forms C2H2 What s the number of sigma and the number of Pi bonds C032 What is the CO bond order Name N 1 Using the Dumas method for determining Molecular weight a chemist boiled a volatile organic liquid in a 5000 mL ask until only the vapors remaine at a pressure of 745 atm The boiling temperature was 850 C She found that the mass of the vapor in the flask was 0721 grams What is the Molecular weight of the compound 28 A compound was found to contain only calcium chromium and 11 oxygen with Ca 1565 Cr 4061 391 What is the empirical formula for the compound 29 An organic compound was found to contain only carbon hydrogen and oxygen A 02028 ram sample was burned in oxygen completely to yield 02972 grams of C02 and 01218 grams of H20 What is the percent composition ie the C H and 0 Do not go own to get the empirical formula a Percent of carbon b Percent of hydrogen c Percent of oxygen 30 A gas was found to diffuse only 1 3 as fast as ammonia What is the molecular weight of the gas 31 A 50 gram sample of ore containing KC103 was heated to decompose the 1C103 and produce 02 What is the KCLOS in the sample if 525 ml of oxygen was obtained at 100 C and 1 atm pressure assume all oxygen came from the KCIOS 2 KClO3 9 2 KCl 3 OZ 32 What is the Molarity of a solution that is 250 KCl with a density of 116 gmL 33 A solution of hydrogen peroxide H202 is titrated with a solution of potassium permanganate KMnO4 The reaction is H202 2KMnO4 SHZSO4 502 2MnSO4 K2804 BHZO It requires 412 mL of 0175 M KMnO4 to titrate 50grams of the hydrogen peroxide solution a What is the HZOZ in the solution b What volume of oxygen is produced at STP 34 Ammonia and hydrogen chloride gases are placed at opposite ends of a 100 cm glass cylinder tube and are allow to ow toward each other Where they meet they will form a white solid ring of ammonium chloride If the tube is marked from 0 to 100 cm starting at the ammonia end where will the white ring orm


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