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A molecule takes 3.0 seconds to diffuse across a membrane. If the thickness of the membrane...

A molecule takes 3.0 seconds to diffuse across a membrane. If the thickness of the membrane is doubled, then how long does it take the molecule to diffuse across the thicker membrane?

a) 18 seconds

b) 20 seconds

c) 30 seconds

d) 24 seconds

e) 12 seconds

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