This problem is providing the average speed at which an argon atom moves at 25 °C and asks for the average wavelength it exhibits. At the end, the answer turns out to be 23.15 pm.
<h3>Broglie wavelength</h3>
In chemistry, when analyzing the wavelength of objects or substances, one can use the Broglie's wavelength formula in order to relate the average speed, mass and wavelength with:
Where h stands for the Planck's constant, m for the mass and v for the average speed. Now, since an argon atom has a mass of 39.948 amu
and 1 amu = 1.6605 x10⁻²⁷ kg, one can plug in these numbers to obtain:
Learn more about Broglie's wavelength: brainly.com/question/8752907