10 m L of 1 m M surfactant solution forms a monolayer covering 0.24 c m 2 on a polar substrate. If the polar head is approximated as a cube, what is its edge length?

Step-by-step solution

Millimoles of surfactants = 10 × 10 - 3 = 10 - 2 Moles of surfactants = 10 - 5 Number of molecules = 6 × 10 23 × 10 - 5 = 6 × 10 + 18 Surface area occupied by one molecule = 0.24 6 × 10 18 = 0.04 × 10 - 18 c m 2 4 × 10 - 20 = a 2 a = 2 × 10 - 10 c m = 2 p m