Which mathematical relationship best describes how the root-mean-square (rms) speed…

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

Which mathematical relationship best describes how the root-mean-square (rms) speed

u_{\text{rms}}

of a gas depends on its molar mass

M

when the temperature is held constant? (a)

u_{\text{rms}} \propto \sqrt{M}

(b)

u_{\text{rms}} \propto \dfrac{1}{M}

(c)

u_{\text{rms}} \propto \dfrac{1}{\sqrt{M}}

(d)

u_{\text{rms}}

is independent of

M