Estimate the time needed for a glycine molecule to diffuse a distance of $20m$ in water at $20C$ if its concentration varies over that distance from $1\mathrm{.}50mo\frac{l}{m^3}$ to $0\mathrm{.}50mo\frac{l}{m^3}?$

Express your answer using two significant figures.

$t=$

s

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Part B

Compare this "speed" to its rms $($thermal$)$ speed. The molecular mass of glycine is about $75u.$

Express your answer using two significant figures.

$\frac{v_{\text{d}\text{i}\text{f}\text{f}\text{u}\text{s}\text{e}}}{v_{rms}}=$

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