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Unformatted text preview: Chem 152 Spring 2007 Assignment 6 15: 30, 33, 36, 37, 43, 72, 75 30. Suppose we picture an electron in a chemical bond as being a wave with fixed ends. Take the length of the bond to be 1 (0.1nm) a) Calculate the wavelength of the electron wave in its ground state and in its first excited state. The groundstate has wavelength 2 and the first excited state 1 b) How many nodes does the excited state have? One. (we wont count the ends because all of the modes have fixed ends.) (see fig) 33. a) The position of an electron is known to be within 10. What is the minimum uncertainty in the velocity? p x>h/4 x 10 (10x10-10 m), so p>6.63x10-34 Js/(4 x10-9 m)= 5.27x10-24 Js/m= (mv) m=9.1x10-31 kg, so v=5.27x10-24 /9.1x10-31 = 5.8x10 4 m/s b) Repeat this calculation for a helium atom. p>6.63x10-34 Js/(4 x10-9 m)= 5.27x10-24 Js/m= (mv) m=4x1.66x10-27 kg, so v=5.27x10-24 /4x1.66x10-27 = 7.9m/s 36. When metallic sodium is dissolved in liquid NaCl electrons are released into the liquid. These dissolved electrons absorb light with a wavelength near 800 nm. Suppose liquid....
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This note was uploaded on 09/26/2011 for the course CHEMISTRY 000 taught by Professor Prof during the Spring '11 term at Rice.
- Spring '11