CHEM 1110 Fall 2024 Exam 1 PDF

CHEM 1110, Fall 2024 Exam 1 _________________________________________________________________________________________________________ Avogadro’s number = 6.022 x 1023 Speed of light C = 3.00 x 108 m/s Pla...

CHEM 1110, Fall 2024 Exam 1 _________________________________________________________________________________________________________ Avogadro’s number = 6.022 x 1023 Speed of light C = 3.00 x 108 m/s Planck’s constant h = 6.63×10−34 J∙s (= 6.63×10-34 kg∙m2/s) CHEM1110 Page 1 of 4 9/13/24 UTC Version A CHEM 1110, Fall 2024 Exam 1 CHEM1110 Page 2 of 4 9/13/24 UTC Version A CHEM 1110, Fall 2024 Exam 1 1) Calculate the frequency of the green light emitted by a 6) An atom of 131Xe contains ________ electrons. hydrogen atom with a wavelength of 486.1 nm. A) 131 A) 1.46 × 1014 s-1 B) 185 B) 6.86 × 1014 s-1 C) 77 C) 4.33 × 1014 s-1 D) 123 E) 54 D) 6.17 × 1014 s-1 E) 1.62 × 1014 s-1 7) Water is an example of A) a compound. B) an element. 2) Which of the following visible colors of light has the C) a heterogeneous mixture. longest wavelength? D) a homogeneous mixture. A) blue E) All of the above are not true. B) green C) yellow 8) Which of the following quantum numbers describes D) red the size and energy of an orbital? E) violet A) magnetic quantum number B) principal quantum number 3) Calculate the energy of the red light emitted by a neon C) angular momentum quantum number atom with a wavelength of 703.2 nm. D) spin quantum number E) Schrödinger quantum number A) 3.54 × 10-19 J B) 4.27 × 10-19 J 9) What mass, in kg, does 5.84 moles of titanium (Ti) C) 2.34 × 10-19 J have? D) 6.45 × 10-19 J E) 2.83 × 10-19 J A) 0.352 kg B) 0.122 kg C) 0.820 kg 4) How many xenon atoms are contained in 2.36 moles D) 0.280 kg of xenon? E) 0.632 kg 10) Determine the energy change associated with the A) 3.92 × 1024 xenon atoms transition from in the hydrogen atom. B) 2.55 × 1023 xenon atoms A) +3.03 × 10-19 J C) 1.42 × 1024 xenon atoms B) -1.82 × 10-19 J D) 7.91 × 1025 xenon atoms C) +5.51 × 10-19 J E) 1.87 × 1026 xenon atoms D) -3.03 × 10-19 J E) +2.69 × 10-19 J 5) Give the possible values for ml for an s orbital. A) 0 B) -1, 0, 1 C) 0, 1 D) 1 E) -2, -1, 0, 1, 2 CHEM1110 Page 3 of 4 9/13/24 UTC Version A CHEM 1110, Fall 2024 Exam 1 11) The mass number is equal to C) salt and water. D) ice tea and lemonade. A) the sum of the sum of the electrons and protons. E) vinegar and water. B) the sum of the sum of the neutrons and electrons. C) the sum of the number of protons, neutrons, and electrons. 16) How are gases different from solids and liquids? D) the sum of the number of protons and neutrons. A) Gases can only be made up of atoms. B) The particles in a gas attract each other much more strongly than in solids and liquids. 12) Give the numbers for ml for a d orbital. C) Gases are compressible. A) 0, 1, 2, 3, 4 D) Only gases can take the shape of their container. B) 1, 2, 3, 4, 5 E) Gases are colorless. C) 1, 2, 3 D) -2, -1, 0, 1, 2 17) The atomic number (Z) is the number of ________ 13) Each of the following sets of quantum numbers is found in the nucleus of an atom. supposed to specify an orbital. Which of the following A) neutrons sets of quantum numbers contains an error? B) protons C) protons and neutrons A) n = 2, l = 1 , ml = -1 D) electrons B) n = 4, l = 2, ml =0 E) protons and electrons C) n = 3, l =3 , ml = -2 D) n = 1, l = 0, ml =0 18) an atom that has lost an electron is E) n = 3, l = 0, ml =0 A) a cation. B) unlikely to be found in homogeneous mixtures. C) electrically neutral. 14) Which of the following statements is TRUE? D) likely to behave exactly like the parent atom. E) an anion. A) The principal quantum number (n) describes the shape of an orbital. B) The angular momentum quantum number (l) 19) The number of cycles that pass through a stationary describes the the size and energy associated with an point is called orbital. A) wavelength. C) The magnetic quantum number (ml) describes the B) amplitude. orientation of the orbital. C) frequency. D) An orbital is the path that an electron follows during D) area. its movement in an atom. E) median. E) All of the above are true. 20) What value of l is represented by an f orbital? 15) All of the following will lead to a homogeneous A) 1 mixture EXCEPT B) 2 A) sugar and coffee. C) 0 B) mud and water. D) 3 CHEM1110 Page 4 of 4 9/13/24 UTC Version A