The root-mean-square (rms) speed of hydrogen molecules at is We have to compute the speed of colloidal particles of “molar mass” .
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Solution: Click For PDF Version Relation between the average kinetic energy of a particle of mass m in a gas at temperature T is or
We have to find the of colloidal particles of molar mass Therefore, the mass of a single colloidal particle will be
And, the rms speed of the colloidal particles will be
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