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Compute an estimate of how long it would take for a gaseous air1borne cold virus of molar mass 100 kg mol-1 to travel the distance between two conversing people 1.0 m apart by diffusion in still, 25 °C air at 1.0 atm. Presume the bulk density of the virus is the same as that of water. Derived from result, comment on what bearing this computation has on the likelihood of catching a cold.

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