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secondary 4 | Biology
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How to find the number of repeat units?
Date Posted: 6 years ago
Views: 806
Mass of polystyrene: 0.120g
Molecular mass of styrene (C6H5CH=CH2) =104 g/gmol
Let polystyrene be -(-C6H5CH-CH2-)-n
Number of moles of styrene
= 0.120/104
= 0.001154 mol
Number of molecules:
n= avogadros number x moles
= 0.001154 x 6.022x10^23
= 6.95x10^20
Go and try it yourself!
Molecular mass of styrene (C6H5CH=CH2) =104 g/gmol
Let polystyrene be -(-C6H5CH-CH2-)-n
Number of moles of styrene
= 0.120/104
= 0.001154 mol
Number of molecules:
n= avogadros number x moles
= 0.001154 x 6.022x10^23
= 6.95x10^20
Go and try it yourself!
I thought the qn is asking for number of repeat units?
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