practice midterm 2 chem 121

practice midterm 2 chem 121 - h = 6.626 10-34 J-s RH = 2.18...

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h = 6.626 × 10 -34 J-s R H = 2.18 × 10 -18 J c = 3.00 × 10 8 m/s Avogadro’s Number = 6.022 × 10 23 1. An argon ion laser emits light with a wavelength of 489 nm. What is the frequency of this radiation? (a) 9.27 × 10 15 Hz (b) 6.13 × 10 14 Hz (c) 1.63 × 10 -15 Hz (d) 147 Hz (e) 1.63 × 10 14 Hz 2. What is the energy of a photon emitted by the argon ion laser in problem 1 ( λ = 489 nm)? (a) 4.07 × 10 -19 J (b) 6.13 × 10 14 J (c) 1.36 × 10 -27 J (d) 3.24 × 10 -40 J (e) 5.29 × 10 -18 J 3. What is the wavelength of a photon whose energy is 2.15 × 10 -19 J? (a) 752 nm (b) 1.08 × 10 6 m (c) 925 nm (d) 357 nm (e) 3.24 × 10 18 m 4. Which of the following statements is false ? (a) Ultraviolet photons have higher energies than visible photons (b) Ultraviolet photons travel through a vacuum faster than visible photons (c) Ultraviolet photons have higher frequencies than visible photons (d) Ultraviolet light is a form of electromagnetic radiation (e) Ultraviolet photons have shorter wavelengths than visible photons
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5. What will happen if an electron in a hydrogen atom relaxes from the n = 3 level to the n = 2 level? (a) A photon will be emitted (created) with a wavelength of 547 nm (b) A photon will be absorbed (destroyed) with a wavelength of 547 nm (c) A photon will be emitted (given off) with a wavelength of 303 nm (d) A photon will be absorbed (destroyed) with a wavelength of 656
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This note was uploaded on 06/01/2008 for the course CHEM 121 taught by Professor Wyzlouzil during the Spring '07 term at Ohio State.

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practice midterm 2 chem 121 - h = 6.626 10-34 J-s RH = 2.18...

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