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CHM012 Assignment 03, Assignments of Chemistry

Mindanao State University - Iligan Institute of Technology (MSUIIT)Chemistry

Chemistry for Engineers assignment

Typology: Assignments

2019/2020

Uploaded on 05/28/2022

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Abigail E. Sasuman
BS Civil Engineering, 1st Year
CHM012-B3
Assignment 3:
1. Neutron diffraction is used in determining the structures of molecules.
a. Calculate the de Broglie wavelength of a neutron moving at 1.00% of the speed
of light.
b. Calculate the velocity of a neutron with a wavelength of 75 pm (1 pm = 10-12 m).
Ans.:
a.
b.
pf2

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Abigail E. Sasuman BS Civil Engineering, 1st Year CHM012-B Assignment 3:

  1. Neutron diffraction is used in determining the structures of molecules. a. Calculate the de Broglie wavelength of a neutron moving at 1.00% of the speed of light. b. Calculate the velocity of a neutron with a wavelength of 75 pm (1 pm = 10-12 m). Ans.: a. b.
  1. Why is it significant that the color emitted from the hydrogen emission spectrum is not white? -It is significant that it does not emit white (as white is the combination of all colors), since only certain colors are emitted by hydrogen as it returns to its ground state from getting excited. This also aligns to the idea that hydrogen only allows certain energies.
  2. How does the emission spectrum support the idea of quantized energy levels? -When atoms are given energy, the electrons absorb energy and it moves to different energy levels discretely (step by step), rather than continuously, which means the energy levels of atoms are quantized. As they move from different energy levels, certain color of light depends on the energy level it moves to. Since hydrogen only emits certain colors, it means it only allows certain energy levels, proving that energy levels are quantized.