Gen Chem Study Guide

A. WORK-OUT PROBLEMS Write formulas for the next calcium nitratephosphorous pentafluoride aluminum carbonatestrontium hydrated oxide methanepotassium oxide lithium chloridebarium sulfate phosphate iondinitrogen tetroxide Give the complete electron configurations of S, O2-, and Mn. For the next bulwarkecules/ions, give the Lewis structure, groyneecular geometry, and electron pair geometry NO2-SF4 Write Lewis structures to represent every resonance forms of CO32-. 5. How numerous joules of heat vitality argon lost when a 100-gram archetype of a metal (with a specific heat of 0. 312 J/(g?C) cools from 80. 0? C to 30. 0? C? Calculate the add of molees in 4. 20 X 1024 molecules of SO2 240 grams of NaOH 5. 00 liters of H2 gas at 0? C and 1. 00 asynchronous transfer mode. 1. 7 liters of Ar gas at STP 7. How many grams of AlCl3 can be prep ard from 50. 0 g of Al and 100. 0 g of Cl2 agree to the equation 2 Al + 3 Cl2 ? 2 AlCl3 ? How many neutrons argon there in 131I? Which bond is the approximately polar? I-ClI-Br I-SI-I Circle the molecules that ar polar (have a dipole moment) CCl4CH4H2ONH3HBrCHCl3 CCl2F2 How many unpaired electrons does the Si molecule have?Write the correct Lewis structure for CS2. Write the formal charges on all(prenominal) atom in F-S=F2+ (lone pairs are not shown). How many ions are formed when Ca3(PO4)2 dissolves? How many protons, neutrons, and electrons are there in 19F- ion? Discuss the properties of molecules utilize as liquid crystals. (ignore this question) What is the molarity of the result made when 1. 25 grams of sodium chloride are dissolved in 500 mL of water? What is the carrefour of the carbon atom C2H2 ? What is the molecular formula of a compound with 30. 5% N and 69. 5% S, and it has a molar mass of 184 g/mol?How many electrons are found at the sublevel 1=2? How many sigma and how many pi bonds does carbon dioxide have? How many milliliters of 2. 5M solution are needed to prepare 500 mL of 0. 08M solution? How m any milliliters of 1. 25M hydrochloric loony toons are needed to neutralize 50. 0 millimeters of 0. 55M barium hydroxide? The vaporisation pressure of SiCl4 is 100 mmHg at 5. 4? C and the normal simmering point is 56. 8? C. What is ? Hvap for SiCl4 in kJ/mol? B. MULTIPLE CHOICE A 34. 6 g sample of calcium oxide is a. 0. 0346 molb. 0. 617 molc. 1. 23 mold. 34. 6 mol 2.When the side by side(p) equation is balanced, the total number of nitrogen atoms on the reactant spatial relation isBaCl2(aq) + AgNO3(aq) ? Ba(NO3)2(aq) + AgCl(s) a. 2b. 3c. 4d. 6 given over that 4 HNO3(aq)? 4NO2(aq) + 2 H2O(l) + O2(g), the kernel of NO2 which could be produced from 3. 00 mol HNO3 is a. 138 gb. 177 gc. 184 g d. 236 g Given that 3 CuCl2(aq) + 2 Al(s) ? 3 Cu(s) + 2 AlCl3(aq), the amount of Al required to produce 42. 4 g of Cu is a. 12. 0 gb. 28. 3g c. 40. 5 gd. 42. 4 g The type of substance least(prenominal) likely to appear as a product in a net ionic equation is a soluble saltc. weak electrolyte an non-water-soluble saltd. an insoluble gas When a solution of NiBr2 is mixed with a solution 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 sample of chlorine gas at 35? C doubles in great deal, its pressure stays the samec. is half as bulky doubles d. increases fourfold A 385-mL sample of oxygen gas calm at 747 mm Hg and 27. 4?C would occupy what volume at STP? a. 344 mLb. 356 mLc. 416 mLd. 431 mL A 9. 74 g sample of CO2 will occupy 6. 37 L at 0. 829 atm only if the temperature is a. 17. 6? Cb. 6. 61? Cc. 564? C d. higher up 100? C A sample of N2 would obey the ideal 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 sample of an unknown substance absorbed 1. 64 kJ as its temperature changed from 36? C to 98? C. The specific heat of the unknown 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 formation reaction in this list 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 much HCl was formed when 201 kJ were given off? a. 18. 2 gb. 72. 9 gc. 146 gd. 292 g Use the thermochemical equations below to calculate 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 energy of a photon of electromagnetic shaft is directly proportional to its a. speed in a vacuum c. oftenness b. wavelength d. diffraction The volume in space where an electron with a particular energy is likely to be found is called a wave functionc. the spin quantu m number a photond. an orbital The frequency of a microwave with a wavelength 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 number of orbitals in the 4p subshell is a. 1b. 3c. 5d. 18The energy residue between the two energy levels responsible for the 451 nm blue-violet line the emanation 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 maximum number of electrons contained in a 3d subshell is a. 2b. 6c. 10d. 18 The number of valence electrons shown in the Lewis formula for SF4 is a. 40b. 34c. 32d. 5 The formal charge on O in the compound H2O2 (in the order HOOH) is a. 0b. 2c. 1d. 3 The resonance structures for SO2 include each of these except a. O=S-Ob. O-S=Oc. O=S=Od. S-O=O The O-S-O bond wobble in SO2 is closest to a. 0? b. 109. 5? c. 120? d. 180? Of the following substances, the least polar bonds are those found in a. H2b. H2Oc. H2Sd. CH4 Matter is verbalize to be transparent to those waveleng ths it a. absorbs b. diffractsc. cyclesd. transmits In formaldehyde (H2CO) the electron pairs are find about the central atom in which type of arrangement? a. pointed b. tetrahedralc. symmetrical planard. bent The molecular geometry of SO3 is best described as a. linearb. trigonal planarc. tetrahedrald. bent The molecular geometry of CO32- is best described as a. linearb. trigonal planerc. tetrahedrald. bentOf the following, which has a molecular geometry that is not planar? a. CH4b. H2COc. C2H4d. SO3 When a solution of sodium chloride and a solution of lithium nitrate are mixed a precipitate forms a new salt is formed a gas is evolved no reaction occurs When solutions of barium chloride and sodium sulfate are mixed, the spectator ions in the resulting reaction are a. only Ba2+b. only SO42-c. Only Na+d. both(prenominal) Na+ and Cl- Which of the following ionic compounds is insoluble in water? a. NH4Clb. AgNO3c. KId. Na2S Given that Fe2O3(s) + 3CO(g) ? 2Fe(s) + 3CO2(g), when 45. 3 g of CO reacts quantitatively with 79. g of Fe2O3, the amount of Fe formed is a. 45. 3 gb. 55. 8 gc. 60. 2 gd. 79. 8 g For the above reaction, when 45. 3 g of CO reacts quantitatively with 79. 8 g of Fe2O3, the amount of leftover reactant is a. 34. 5 gb. 24. 0 gc. 17. 8 gd. 3. 2 g 36. The oxidation numbers 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 agent in the following 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)