There are 10 drops of hexane in one ml, it took 39 drops to form a phospholipid bilayer, Assuming the molecules are square, what is the area of one molecule?

Solution :

Assume that the diameter of the watch glass is 9.5 cm.

There are 10 drops of hexagon in 1 mL.

V = volume of hexagon in per drop =  mL per drop

V = 0.1 mL per drop

N = number of drops to form phospholipid layer

N = 39 (assumed)

= volume of hexagon required to form phospholipid layer

= V x N

= 0.1 x 39  

   = 3.9 mL

Since 1 mL = 1

∴    = 3.9

d = diameter of the watch glass = 9.5 cm

A = area of one molecule

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