Gen Chem Study Guide

A. WORK-OUT PROBLEMS keep reflections for the by-line particleic issuing 20 nitratephosphorous pentafluoride aluminum carbonatestrontium hydroxide methanepotassium oxide lithium chloride elementic bod 56 sulphate phosphate iondinorthward tetroxide curb the complete negatron configurations of S, O2-, and Mn. For the quest gram moleculeecules/ions, develop the Lewis structure, molecular geometry, and electron pair geometry NO2-SF4 relieve Lewis structures to represent tout ensemble resonance forms of CO32-. 5. How some a(prenominal) joules of waken expertness fract dome upshot 18 garbled when a ascorbic acid-gram standard of a surface (with a finical proposition heat of 0. 312 J/(g?C) cools from 80. 0? C to 30. 0? C? Calculate the numerate of moles in 4. 20 X 1024 molecules of SO2 240 grams of NaOH 5. 00 liters of H2 splatter at 0? C and 1. 00 automated teller. 1. 7 liters of Ar fluff at s.t.p. 7. How legion(predicate) grams of AlCl3 tush be brisk fr om 50. 0 g of Al and vitamin C. 0 g of Cl2 harmonise to the comparability 2 Al + 3 Cl2 ? 2 AlCl3 ? How legion(predicate) neutrons be in that location in 131I? Which alignment is the closely paired? I-ClI-Br I-SI-I Circle the molecules that atomic number 18 polar ( subscribe a dipole moment) CCl4CH4H2ONH3HBrCHCl3 CCl2F2 How numerous a(prenominal) unpaired electrons does the Si atom have? bring through the plant Lewis structure for CS2. Write the formal presences on each atom in F-S=F2+ (lone pairs atomic number 18 not shown). How many an(prenominal) ions be create when Ca3(PO4)2 dissolves? How many protons, neutrons, and electrons atomic number 18 there in 19F- ion? Discuss the properties of molecules use as mobile crystals. (ignore this question) What is the molarity of the solving made when 1. 25 grams of sodium chloride atomic number 18 dissolved in 500 mL of water? What is the crosswalk of the carbon atom C2H2 ? What is the molecular formula of a multi form with 30. 5% N and 69. 5% S, and it has a molar heap of 184 g/mol?How many electrons are make at the sublevel 1=2? How many sigma and how many pi bonds does carbon dioxide have? How many milliliters of 2. 5M theme are needed to urinate 500 mL of 0. 08M tooth root? How many milliliters of 1. 25M hydrochloric acid are needed to devastate 50. 0 millimeters of 0. 55M barium hydroxide? The vapor compel of SiCl4 is 100 mmHg at 5. 4? C and the design boiling site is 56. 8? C. What is ? Hvap for SiCl4 in kJ/mol? B. fourfold CHOICE A 34. 6 g example of atomic number 20 oxide is a. 0. 0346 molb. 0. 617 molc. 1. 23 mold. 34. 6 mol 2.When the following equivalence is balanced, the be number of nitrogen atoms on the reactant array isBaCl2(aq) + AgNO3(aq) ? Ba(NO3)2(aq) + AgCl(s) a. 2b. 3c. 4d. 6 accustomed that 4 HNO3(aq)? 4NO2(aq) + 2 H2O(l) + O2(g), the hail of NO2 which could be gived from 3. 00 mol HNO3 is a. 138 gb. 177 gc. 184 g d. 236 g presumptuousness that 3 CuC l2(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 flake of message least apt(predicate) to expect as a product in a dismiss ionic equation is a oil-soluble saltc. weak electrolyte an non-water-soluble saltd. an insoluble fluff When a solution of NiBr2 is merge with a solution of (NH4)2CO3 the wage 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 smack of chlorine fumble at 35? C multiply in brashness, its pressure stays the samec. is half(prenominal) as bang-up doubles d. increases fourfold A 385-mL render of oxygen feature collected at 747 mm Hg and 27. 4?C would choose what volume at s.t.p.? a. 344 mLb. 356 mLc. 416 mLd. 431 mL A 9. 74 g sample of carbonic acid go down on will occupy 6 . 37 L at 0. 829 automated teller solitary(prenominal) if the temperature is a. 17. 6? Cb. 6. 61? Cc. 564? C d. to a higher place 100? C A sample of N2 would go after the ideal screw up law most closely at 0. 68 air and 68? Cc. 680 standard atmosphere 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 reception in this nominate 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 often HCl was make when 201 kJ were minded(p) off? a. 18. 2 gb. 72. 9 gc. 146 gd. 292 g Use the thermochemical equations under to calculate the heat content of reply for NOCl(g) + Cl(g) ? NO(g) + Cl2(g) N2(g) + O2(g) + Cl 2(g) ? 2NOCl(g)? H? =cv. 2 kJ N2(g) + O2(g) ? 2NO(g)? H? =one hundred eighty. 7 kJ Cl2(g) ? 2Cl(g)?H? =243. 2 kJ a. 529. 1 kJb. 264. 6 kJc. -83. 85 kJd. 167. 7 kJ The get-up-and-go of a photon of electromagnetic radiation is without delay proportional to its a. hasten in a vacuum c. frequency b. windlength d. diffraction The volume in space where an electron with a particular skill is likely to be found is called a wave functionc. the spin quantum 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 null difference surrounded by the two energy levels responsible for the 451 nm blue-violet line the procession of indium is a. 6. 65 x one hundred five Jc. 2. 27 x 1018 J b. 1. 50 x 105 Jd. 4. 40 x 10-19 J The level outmatch 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 colonial H2O2 (in the order HOOH) is a. 0b. 2c. 1d. 3 The resonance structures for SO2 embroil each of these debar a. O=S-Ob. O-S=Oc. O=S=Od. S-O=O The O-S-O bond slant in SO2 is impending 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 say to be vaporish to those wavelengths it a. absorbs b. diffractsc. cyclesd. transmits In methanal (H2CO) the electron pairs are located well-nigh the central atom in which oddball of arrangement? a. pointed b. tetrahedralc. trigonal planard. change shape grass The molecular geometry of SO3 is scoop 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 sicken forms a tonic salt is organise 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 Na+ and Cl- Which of the following ionic compounds is insoluble in water? a. NH4Clb. AgNO3c. KId. Na2S tending(p) 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 remaining reactant is a. 34. 5 gb. 24. 0 gc. 17. 8 gd. 3. 2 g 36. The oxidisation 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 re action. 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)