The atomic masses of He and Ne are 4 and 20 amu., respectively. The value of the de Broglie wavelength of He gas at − 7 3 0 C is "M" times that of the de Broglie wavelength of Ne at 72 7 ∘ C . The val

Question

The atomic masses of He and Ne are 4 and 20 amu., respectively. The value of the de Broglie wavelength of He gas at − 7 3 0 C is "M" times that of the de Broglie wavelength of Ne at 72 7 ∘ C . The value of ' M ' for one mole of each gas taken?

TestHub · Accepted Answer

V He ​ V N e ​ ​ = M N e ​ T N e ​ ​ × T He ​ M He ​ ​ ​ = 20 1000 ​ × 200 4 ​ ​ = 1 λ N e ​ λ He ​ ​ = m He ​ × V He ​ m N e ​ × V N e ​ ​ = 4 20 ​ = 5

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