Final Exam Review PDF

Final Exam Review (Answers in capital letters) 1. A rectangular block of copper has a mass of 5. How many neutrons are in the nucleus of an 143.584 g and measures 5.05 cm by 2.55 18 atom of 8 O? cm by 1.25 cm....

Final Exam Review (Answers in capital letters) 1. A rectangular block of copper has a mass of 5. How many neutrons are in the nucleus of an 143.584 g and measures 5.05 cm by 2.55 18 atom of 8 O? cm by 1.25 cm. Find the density of the copper block. (a) 8 (B) 10 (a) 0.112 g/cm3 (c) 18 (d) 26 (B ) 8.92 g/cm3 6. What is the term for two atoms of the same element that differ by the number of (c) 11.1 g/cm3 neutrons in the nucleus? (a) atomic mass units (d) 28.4 g/cm3 (B ) isotopes (e) 29.0 g/cm3 (c) nucleons 2. What is the term for an attraction between a hydrogen atom bonded to a highly (d) photons electronegative atom (O, N, or F), and a nonbonding electron pair on a highly (e) none of the above electronegative atom in another molecule? 7. What is the chemical formula for tin(II) (a) dipole force chlorate? (b) dispersion force (a) Sn(ClO2)2 ( C) hydrogen bond (b) Sn(ClO2)4 (d) intermolecular bond ( C) Sn(ClO3)2 (d) Sn(ClO3)4 3. Which of the following changes increases the 8. Which is a buffer system? pressure of a gas? (a) decreasing the volume (a) nitric acid and sodium nitrate (b) increasing temperature (b) water and sodium chloride (c) increasing the number of (c) hydrochloric acid and sodium molecules hydroxide (D) all of the above (D) phosphoric acid and sodium (e) none of the above phosphate 4. How many moles of C are produced from the 9. If 10.0 mL of blood plasma has a mass of reaction of 1.50 mol A and 3.50 mol B? 10.279 g and contains 0.870 g of protein, what is the mass/mass percent A(g) + 2 B(g) 3 C(g) concentration of the sample? (a) 1.50 mol (b) 3.50 mol (a) 0.870% (C) 4.50 mol (B ) 8.46% (d) 5.25 mol (c) 8.70% (d) 32.1% (e) none of the above 10. What term refers to a chemical reaction that 15. How many bromine molecules, Br2, have a releases heat energy? mass equal to 31.8 g? (A) 1.20 1023 molecules (a) endothermic (b) 1.51 1024 molecules (B ) exothermic (c) 1.91 1025 molecules (c) isothermal (d) 2.40 1023 molecules (d) all of the above (e) 3.03 1024 molecules (e) none of the above 11. According to the general trends in the 16. If 25.0 mL of 0.100 M lithium iodide reacts periodic table, which of the following is the completely with aqueous mercury(II) most electronegative element? nitrate, what is the how many mL of 0.250 (a) Ne (c) O M mercury(II) nitrate solution is needed? (B ) F (d) N (e) C 2 LiI(aq) + Hg(NO3)2(aq) HgI2(s) + 2 LiNO3(aq) 12. An unknown gas occupies a volume of 4.75 L a) 10.0 mL g at 1227 C and 5.00 atm. If the mass is 5.45 (b) 15.00 mL g, what is the molar mass of the gas? (R = (C) 5.00 mL 0.0821 atm L/mol K) (d) 12.5 mL (a) 21.5 g/mol (b) 23.8 g/mol 17. What volume of 12 M hydrochloric acid (C) 28.3 g/mol must be diluted with distilled water to (d) 141 g/mol prepare 5.0 L of 0.10 M HCl? (e) 344 g/mol (a) 0.042 mL 13. What is the mass of iron produced from (b) 6 mL (C) 42 mL 75.0 g of ferrous oxide (71.85 g/mol) and (d) 60 mL 25.0 g of magnesium metal? FeO(s) + Mg(s) Fe(l) + MgO(s) 18. How many moles of oxygen are produced (a) 28.7 g from 1.00 mol of hydrogen peroxide? (b) 29.1 g _H2O2(l) __H2O(l) + __O2(g) (C) 57.4 g (A) 0.500 mol (d) 58.3 g (b) 1.00 mol (e) 100.0 g (c) 2.00 mol (d) 4.00 mol 14.. What is the density of hydrogen sulfide (e) none of the above gas, H2S, at STP? (a) 0.0893 g/L (b) 0.659 g/L (C) 1.52 g/L (d) 11.2 g/L 19. What is the term for a substance that is a the temperature remains constant, what is good hydrogen ions donor? the final pressure? (a) 0.167 psi (a) Arrhenius acid (b) 3.38 psi (b) Arrhenius base (C) 16.7 psi (C) Brønsted–Lowry acid (d) 75.0 psi (e) 338 psi (d) Brønsted–Lowry base 25. Rubbing alcohol freezes at –129°F. What is 20. If the radius of a silicon atom is 1.18 10–8 the freezing point on the Celsius scale? cm, what is the radius in nm? (a) 1.18 10–15 nm (a) –290°C (b) 1.18 10–10 nm (b) –200 C (C) 1.18 10–1 nm (c) –103°C (d) 1.18 101 nm (D) –89.4 C (e) 1.18 103 nm (e) –54 C 21. Which of the following in aqueous solution 26. What is the [ H+ ] in an acid rain sample that is a weak electrolyte? registers 3.22 using a pH meter? (a) 0.51 M (A) H2CO3(aq) (b) 0.017 M (b) LiOH(aq) (C) 0.000 60 M (c) NH4Cl(aq) (d) 0.000 17 M (d) all of the above 27. What is the pH of a 0.000 042 M HCl 22. Element X has two natural isotopes: X-6 solution? (6.015 amu) and X-7 (7.016 amu). Calculate the atomic mass of element X given the (a) 0.62 abundance of X-7 is 92.5%. (B ) 4.38 (a) 6.09 amu (c) 4.62 (b) 6.50 amu (d) 5.38 (c) 6.52 amu (D) 6.94 amu 28. What is the coefficient of oxygen gas after (e) 12.5 amu balancing the following equation? 23. What are the names of HCl(aq) and H2SO3, __P(s) + __O2(g) --> __P2O3(s) respectively? a) chlorine acid and hydrosulfite acid (a) 1 b) hydrogen chloride and hydrosulfuric (b) 2 acid ( C) 3 c) hydrochloric acid and sulfurous acid (d) 5 D) hydrochloric acid and sulfuric acid (e) none of the above 24. A sample of krypton gas at 75.0 psi and 100°C expands from 0.100L to 0.450 L. If 29. Which element has the following electron 34. If a drain cleaner has a pH of 14, the configuration: 1s2 2s2 2p6 3s2 3p6 solution is which of the following? (a) strongly acidic 4s23d10 4p6 5s2? (b) weakly acidic (a) Ca (c) neutral (b) Rb (d) weakly basic (c) Sn (E) strongly basic (D) Sr (e) none of the above 35. What are the products from the complete neutralization of phosphoric acid with 30. Water in a swimming pool contains aqueous lithium hydroxide? dissolved sodium chloride and many other salts. Which of the following describes (a) LiH2PO4(aq) and H2O(l) water in a swimming pool? (b) Li2HPO4(aq) and H2O(l) (a) compound ( C) Li3PO4(aq) and H2O(l) (b) element (d) LiHPO4(aq) and H2O(l) (c) heterogeneous mixture (e) Li2PO4(aq) and H2O(l) (D) homogeneous mixture 31. What is the chemical formula for silver 36. Which of the following ions has the same oxide? electron configuration as the noble gas (a) AgO neon? (b) AgO2 (a) F– (C) Ag2O (d) Ag2O3 (b) Na+ (e) none of the above (c) Mg2+ (d) Al3+ 32. A sample of air at 7.50 atm is heated from (E ) all of the above 224 K to 448 K. If the volume remains constant, what is the final pressure? 37. What substance is reduced in the following (a) 4.57 atm redox reaction? (b) 3.75 atm (c) 6.15 atm H+(aq) + Fe(s) + NO3–(aq) Fe3+(aq) (d) 12.3 atm + NO(aq) + H2O(l) (E) 15.0 atm (a) Fe 33. Hydrogen-3 can be used as a chemical (b) Fe3+ tracer. If 2400 µg decays to 600 µg after ( C) NO3– 24.8 years, what is the half-life of the (d) NO radionuclide? (e) none of the above (a) 6.2 years (B ) 12.4 years (c) 24.8 years (d) 49.6 years 38. If 1.888 g of bismuth metal react with sulfur decays to lead-206 and an alpha particle. to give 2.323 g of bismuth sulfide, what is What is the parent nuclide? the empirical formula of the product? (a) BiS 202 210 (a) 80 Hg (b) 83 Bi (b) BiS2 (c) BiS3 206 210 (c) 84 Po (D) 84 Po (D) Bi2S3 (e) Bi3S2 44. What substance is the oxidizing agent in the 39. What is the name of the particle having the following redox reaction? 0 following atomic notation: +1 e? Co(s) + 2 HCl(aq) CoCl2(aq) + H2(g) (a) electron (b) neutron (a) Co ( C) positron (B ) HCl (d) proton (c) CoCl2 (d) H2 40. What is the electron configuration for a nitride ion, N3–? 45. What is the maximum number of electrons (a) 1s2 2s2 2p3 that can occupy the 3d subshell? (b) 1s2 2s2 2p4 (a) 2 (c) 1s2 2s2 2p5 (b) 3 (D) 1s2 2s2 2p6 (c) 5 (e) none of the above (D) 10 41. What is the oxidation number of chlorine in 46. What volume of rubbing alcohol (d = 0.785 LiClO2? g/mL) would need to be measured out in order (a) –1 to supply 20.0 g? (b) +1 (a) 15.7 mL ( C) +3 (b) 20.0 mL (d) +5 (c) 39.3 mL (e) none of the above (D) 25.5 mL 47. Dinitrogen tetraoxide decomposes to 42. What is the [ OH– ] in a seawater sample if produce nitrogen dioxide. Calculate the the pH is 8.65? equilibrium constant for the reaction given the equilibrium concentrations at 100°C: (a) 0.22 M [N2O4] = 0.800 and [NO2] = 0.400. (b) 5.35 M N2O4(g) 2 NO2(g) ( C) 4.5x10-6 M (d) 2.2x10-9 M (A) Keq = 0.200 (b) Keq = 0.500 43. In the final step of the uranium-238 (c) Keq = 0.625 disintegration series, the parent nuclide (d) Keq = 2.00 48. What is the name of the particle having the 4 following atomic notation: 2 He? (A) alpha (b) beta (c) gamma (d) neutron 49. How many significant digits are in the volume measurement 0.0040400 liters? (a) 3 (b) 4 (C) 5 (d) 6 (e) 7 50. Which of the following has the smallest atomic radius? (A) F (b) Cl (c) Br (d) O (e) S 51. What is the name for Mn3N2? (a) manganese nitride (b) manganous nitride (C) manganese(II) nitride (d) manganese(III) nitride (e) none of the above