The value of a diffusion coefficient of 18.5 in2/min expressed in SI units is 0.000198924 m^2/s.
The International System of Units can be regarded as a body that provide a universal scientific unit to all units.
Since
[tex]1in^2 = 1.07527*10^-5 m^2/s[/tex]
Then 18.5 in^2/min= 0.000198924 m^2/s
Therefore, the value of a diffusion coefficient of 18.5 in2/min expressed in SI units is 0.000198924 m^2/s.
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