gel electrophoresis, the mobility μ of a molecule in a particular gel matrix is defined as μ = vt/E, where vt is the terminal speed of the molecule and E is the applied electric field strength. In one case, a molecule has mobility 2.83 × 10−8 C·m/(N·s) and charge −12e. How long does it take the molecule to move 2.10 cm through the gel if the terminal speed of the molecule is 1.80 × 10−5 m/s?

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