A common lipid in brain membranes is called L-alpha-phosphatidylcholine, or PC. PC has a formula of (C subscript 42 H subscript 82 NO subscript 8 P). Each PC molecule occupies an area of 55 square angstroms on one side of the surface of a vesicle. You have 55.0 g of PC, which form into spherical vesicles with a radius of 200. nm. How many vesicles can you form?
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Expert's answer
2012-10-08T10:00:52-0400
C42H82NO8P have molar mass 759
55.0 n C42H82NO8P--------------C42H82NO8P 759 & 6.02x10^23
n=4.36 x 10^22 molecules
Square of this molecules is 55 A^2 *4.36 x 10^22 =2.399 x 10^24
Square of vesicles = = 4 pi r^2 = 4*3.14 *200^2 =502400 nm = 5024000 A (1 nm =10 A)
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