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A Gas of Helium Atoms (Each of Mass 6

Question 14

Multiple Choice

A gas of helium atoms (each of mass 6.65 × 10-27 kg) are at room temperature of 20.0°C.What is the de Broglie wavelength of the helium atoms that are moving at the root-mean-square speed? (h = 6.626 × 10-34 J • s,the Boltzmann constant is A gas of helium atoms (each of mass 6.65 × 10<sup>-27</sup> kg) are at room temperature of 20.0°C.What is the de Broglie wavelength of the helium atoms that are moving at the root-mean-square speed? (h = 6.626 × 10<sup>-34</sup> J • s,the Boltzmann constant is A) 5.22 × 10<sup>-11</sup> m B) 7.38 × 10<sup>-11</sup> m C) 1.04 × 10<sup>-10</sup> m D) 2.82 × 10<sup>-10</sup> m E) 3.99 × 10<sup>-10</sup> m


A) 5.22 × 10-11 m
B) 7.38 × 10-11 m
C) 1.04 × 10-10 m
D) 2.82 × 10-10 m
E) 3.99 × 10-10 m

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