ChapterSevenReview - 2300 Chapter 7 Review ΔE=hν, c=λν,...

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Unformatted text preview: 2300 Chapter 7 Review ΔE=hν, c=λν, and possible variations. 1. What is the wavelength (in nanometers) of light having a frequency of 8.6 × 10 13 Hz? A) 3.5 nm B) 3.5 × 10 3 nm C) 3.5 × 10 6 nm D) 2.9 × 10 5 nm 2. What is the frequency (in Hz) of light having a wavelength of 566 nm. A) 1.89 Hz B) 5.30 Hz C) 1.89 × 10 6 Hz D) 5.30 × 10 14 Hz 3. What is the frequency of light having a wavelength of 456 nm? A) 1.37 × 10 2 Hz B) 6.58 × 10 5 Hz C) 6.58 × 10 14 Hz D) 1.37 × 10 14 Hz 4. What is the wavelength (in nanometers) of radiation having a frequency of 2.45 × 10 9 Hz? (This is the type of radiation used in microwave ovens.) A) 1.22 × 10 8 nm B) 8.20 × 10 9 nm C) 1.22 × 10 11 nm D) 8.20 × 10 12 nm 5. The average distance between Mars and Earth is about 1.3 × 10 8 miles. How long would it take TV pictures transmitted from the Viking space vehicle on Mars' surface to reach Earth? (1 mile = 1.61 km.) A) 0.70 s B) 7.0 × 10 2 s C) 2.7 × 10 3 s D) 1.0 × 10 5 s 6. How many seconds would it take a radio wave to travel from the planet Venus to Earth? (Average distance from Venus to Earth = 28 million miles.) A) 1.5 × 10 2 s B) 9.3 × 10 1 s C) 9.3 s D) 0.15 s 7. The SI unit of time is the second, which is defined as 9,192,631,770 cycles of radiation associated with a certain emission process in the cesium atom. Calculate the wavelength of this radiation (to three significant figures). In which region of the electromagnetic spectrum is this wavelength found? A) 3.06 × 10 7 nm, microwave B) 3.06 × 10 10 nm, radio wave C) 3.26 × 10 7 nm, microwave D) 3.26 × 10 10 nm, radio wave 8. The SI unit of length is the meter, which is defined as the length equal to 1,650,763.73 wavelengths of the light emitted by a particular energy transition in krypton atoms. Calculate the frequency of the light to three significant figures. A) 182 s –1 B) 1.82 × 10 14 s –1 C) 4.95 s –1 D) 4.95 × 10 14 s –1 9. A photon has a wavelength of 624 nm. Calculate the energy of the photon in joules. A) 3.19 × 10 –16 J B) 3.19 × 10 –19 J C) 1.24 × 10 –22 J D) 3.19 × 10 –28 J 10. The blue color of the sky results from the scattering of sunlight by air molecules. The blue light has a frequency of about 7.5 × 10 14 Hz. Calculate the wavelength, in nm, associated with this radiation. A) 2.5 × 10 –3 nm B) 4.0 × 10 2 nm C) 4.5 × 10 2 nm D) 4.8 × 10 2 nm 11. A photon has a frequency of 6.0 × 10 4 Hz. Calculate the energy (in joules) of this photon. A) 4.0 × 10 39 J B) 9.0 × 10 37 J C) 4.0 × 10 –29 J D) 1.1 × 10 –38 J 12. A photon has a frequency of 6.0 × 10 4 Hz. Calculate the energy (in joules) of 1 mole of photons all with this frequency....
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This homework help was uploaded on 04/20/2008 for the course CHEM 1300/ taught by Professor Ballester during the Fall '08 term at Nova Southeastern University.

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ChapterSevenReview - 2300 Chapter 7 Review ΔE=hν, c=λν,...

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