CHEM 1211K Practice Exam 3 Comprehensive Study Guide Questions with Answers

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) On the electromagnetic spectrum, visible light is immediately between two other wavelengths. Name them. 1) _______ A) infrared and ultraviolet B) microwave and x-ray C) gamma ray and ultraviolet D) infrared and x-ray E) radio and microwave 2) Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz. 2) _______ A) 436 nm B) 675 nm C) 229 nm D) 485 nm E) 206 nm 3) Which of the following occur as the energy of a photon increases? 3) _______ A) the wavelength increases B) the wavelength gets shorter. C) the frequency decreases. D) the speed increases. E) None of the above occur as the energy of a photon increases. 4) Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 × 103 kJ/mol. 4) _______ A) 147 nm B) 885 nm C) 68.0 nm D) 387 nm E) 113 nm 5) Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 × 106 m/s. 5) _______ A) 5.52 × 10-9 m B) 5.03 × 10-10 m C) 1.81 × 10-10 m D) 1.99 × 10-10 m E) 2.76 × 10-9 m