Gen Chem Study Guide

A. WORK-OUT PROBLEMS: Write formulas for the subjoined: calcium nitratephosphorous pentafluoride aluminum carbonatestrontium hydroxide methanepotassium oxide lithium chloridebarium sulfate phosphate iondinitrogen tetroxide Surrender the accomplished electron configurations of: S, O2-, and Mn. For the subjoined molecules/ions, surrender the Lewis edifice, molecular surveying, and electron couple surveying: NO2-SF4 Write Lewis edifices to indicate all jar forms of CO32-. 5. How manifold joules of ardor principle are past when a 100-gram pattern of a metal (delay a feature ardor of 0. 312 J/(g? C) cools from 80. 0? C to 30. 0? C? Weigh the compute of moles in: 4. 20 X 1024 molecules of SO2 240 grams of NaOH 5. 00 liters of H2 gas at 0? C and 1. 00 atm. 1. 7 liters of Ar gas at STP 7. How manifold grams of AlCl3 can be disposed from 50. 0 g of Al and 100. 0 g of Cl2 according to the equation: 2 Al + 3 Cl2 ? 2 AlCl3 ? How manifold neutrons are there in 131I? Which association is the most polar? I-ClI-Br I-SI-I Circle the molecules that are polar (enjoy a dipole force): CCl4CH4H2ONH3HBrCHCl3 CCl2F2 How manifold unpaired electrons does the Si mote enjoy? Write the improve Lewis edifice for CS2. Write the regular mandible on each mote in [F-S=F]2+ (single couples are not shown). How manifold ions are formed when Ca3(PO4)2 dissolves? How manifold protons, neutrons, and electrons are there in 19F- ion? Discuss the properties of molecules used as mellifluous crystals. (overlook this investigation) What is the molarity of the key made when 1. 25 grams of sodium chloride are dissolved in 500 mL of steep? What is the hybridization of the carbon mote C2H2 ? What is the molecular formula of a coalescence delay 30. 5% N and 69. 5% S, and it has a molar heap of 184 g/mol? How manifold electrons are set-up at the sublevel 1=2? How manifold sigma and how manifold pi associations does carbon dioxide enjoy? How manifold milliliters of 2. 5M key are needed to equip 500 mL of 0. 08M key? How manifold milliliters of 1. 25M hydrochloric active are needed to countervail 50. 0 millimeters of 0. 55M barium hydroxide? The steam constraining of SiCl4 is 100 mmHg at 5. 4? C and the typical boiling aim is 56. 8? C. What is ? Hvap for SiCl4 in kJ/mol? B. MULTIPLE CHOICE A 34. 6 g pattern of calcium oxide is a. 0. 0346 molb. 0. 617 molc. 1. 23 fashion. 34. 6 mol 2. When the subjoined equation is balanced, the aggregate compute of nitrogen motes on the reactant interest is:BaCl2(aq) + AgNO3(aq) ? Ba(NO3)2(aq) + AgCl(s) a. 2b. 3c. 4d. 6 Absorbed that 4 HNO3(aq)? 4NO2(aq) + 2 H2O(l) + O2(g), the sum of NO2 which could be effected from 3. 00 mol HNO3 is: a. 138 gb. 177 gc. 184 g d. 236 g Absorbed that 3 CuCl2(aq) + 2 Al(s) ? 3 Cu(s) + 2 AlCl3(aq), the sum of Al required to fruit 42. 4 g of Cu is: a. 12. 0 gb. 28. 3g c. 40. 5 gd. 42. 4 g The archearchemark of pith last likely to show as a fruit in a net ionic equation is a separable saltc. inefficient electrolyte an inseparable saltd. an inseparable gas When a key of NiBr2 is qualified delay a key of (NH4)2CO3 the net ionic equation is: a. NiBr2(aq) + (NH4)2CO3(aq) ? NiCO3(s) + 2 NH4Br(aq) b. Ni2+ (aq) + 2Br- (aq) ? 2 NH4+ (aq) + CO32- (aq)? NiCO3(s) + 2 NH4+ (aq) + 2 Br- (aq) c. Ni2+ (aq) + CO32-(aq) ? NiCO3(s) d. Br-(aq) + NH4+ (aq) ? NH4Br(aq) When a pattern of chlorine gas at 35? C doubles in tome, its constraining stays the samec. is half as eminent doubles d. increases fourfold A 385-mL pattern of oxygen gas attentive at 747 mm Hg and 27. 4? C would possess what tome at STP? a. 344 mLb. 356 mLc. 416 mLd. 431 mL A 9. 74 g pattern of CO2 accomplish possess 6. 37 L at 0. 829 atm simply if the sky is a. 17. 6? Cb. 6. 61? Cc. 564? C d. over 100? C A pattern of N2 would yield the fictitious gas law most closely at 0. 68 atm and –68? Cc. 680 atm and –68? C 0. 68 atm and 680? Cd. 680 atm and 680? C A 50. 0 g pattern of an mysterious pith exhausted 1. 64 kJ as its sky transitional from 36? C to 98? C. The feature ardor of the mysterious is: a. 0. 53 J/(g? C)b. 0. 76 kJ/(g? C)c. 1. 3 kJ/(g? C)d. 1. 9 kJ/(g? C) The construction reaction in this inventory is a. Sn(s) + 2Cl2(g) ? SnCl4(l)c. 2C2H5OH(l) + 7O2(g) ? 4CO2(g) + 6H2O(l) b. 2HNO2(l) + NO(g) ? 3NO2(g) + H2O(l) d. 2Cl2O(g)? 2Cl2(g) + O2(g) For CH4(g) + 4Cl2(g) ? CCl4(g) + 4HCl(g), ? H? =-402 kJ. How greatly HCl was formed when 201 kJ were surrendern off? a. 18. 2 gb. 72. 9 gc. 146 gd. 292 g Use the thermochemical equations adown to weigh the enthalpy of reaction for NOCl(g) + Cl(g) ? NO(g) + Cl2(g) N2(g) + O2(g) + Cl2(g) ? 2NOCl(g)? H? =105. 2 kJ N2(g) + O2(g) ? 2NO(g)? H? =180. 7 kJ Cl2(g) ? 2Cl(g)? H? =243. 2 kJ a. 529. 1 kJb. 264. 6 kJc. -83. 85 kJd. –167. 7 kJ The principle of a photon of electromagnetic radiation is quickly proportional to its a. urge in a vacuum c. quantity b. thrivelength d. diffraction The tome in room where an electron delay a feature principle is likely to be set-up is named a thrive functionc. the deviate quantum compute a photond. an orbital The quantity of a microthrive delay a thrivelength of 12. 2 cm is a. 8. 08 x 10-33 Hzc. 2. 46 x 107 Hz b. 3. 66 x 109 Hzd. 2. 46 x 109 Hz The compute of orbitals in the 4p subshell is a. 1b. 3c. 5d. 18 The principle dissonance between the two principle levels legal for the 451 nm blue-violet row the emission of indium is a. 6. 65 x 105 Jc. 2. 27 x 1018 J b. 1. 50 x 105 Jd. 4. 40 x 10-19 J The consummation compute of electrons contained in a 3d subshell is a. 2b. 6c. 10d. 18 The compute of valence electrons shown in the Lewis formula for SF4 is a. 40b. 34c. 32d. 5 The regular inculpate on O in the coalescence H2O2 (in the classify HOOH) is a. 0b. –2c. –1d. –3 The jar edifices for SO2 apprehend each of these negative a. O=S-Ob. O-S=Oc. O=S=Od. S-O=O The O-S-O association direction in SO2 is closest to a. 0? b. 109. 5? c. 120? d. 180? Of the subjoined piths, the last polar associations are those set-up in a. H2b. H2Oc. H2Sd. CH4 Matter is said to be indisputable to those thrivelengths it a. absorbs b. diffractsc. cyclesd. transmits In regulardehyde (H2CO) the electron couples are located encircling the convenient mote in which archearchemark of provision? a. pyramidal b. tetrahedralc. trigonal planard. prepossession The molecular surveying of SO3 is best vivid as a. rowarb. trigonal planarc. tetrahedrald. prepossession The molecular surveying of CO32- is best vivid as a. rowarb. trigonal planerc. tetrahedrald. prepossession Of the subjoined, which has a molecular surveying that is not planar? a. CH4b. H2COc. C2H4d. SO3 When a key of sodium chloride and a key of lithium nitrate are qualified a submerge forms a new salt is formed a gas is evolved no reaction occurs When keys of barium chloride and sodium sulfate are qualified, the bystander ions in the resulting reaction are a. simply Ba2+b. simply SO42-c. Simply Na+d. twain Na+ and Cl- Which of the subjoined ionic coalescences is inseparable in steep? a. NH4Clb. AgNO3c. KId. Na2S Absorbed that Fe2O3(s) + 3CO(g) ? 2Fe(s) + 3CO2(g), when 45. 3 g of CO reacts quantitatively delay 79. g of Fe2O3, the sum of Fe formed is a. 45. 3 gb. 55. 8 gc. 60. 2 gd. 79. 8 g For the over reaction, when 45. 3 g of CO reacts quantitatively delay 79. 8 g of Fe2O3, the sum of leftover reactant is a. 34. 5 gb. 24. 0 gc. 17. 8 gd. 3. 2 g 36. The oxidation computes of P, S and Cl in H2PO2-, H2S and KClO4 are, respectively a) -1, -1, +3 b) +1, -2, +7 c) +1, +2, +7 d) -1, -2, +7 e) -1, -2, +3 37. Identify the oxidizing personation in the subjoined redox reaction. Hg2+(aq) + Cu(s) > Cu2+(aq) + Hg(l) a) Hg2+(aq) b) Cu(s) c) Cu2+(aq) d) Hg(l) e) Hg2+(aq) and Cu2+(aq)