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URGENT CHEM PP1 QUES!

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Wahab09:
If ethene polymerises to polyethene.. what remains the same?

thanks and can u explain y please?

....:

--- Quote from: Wahab09 on June 11, 2009, 05:45:44 pm ---If ethene polymerises to polyethene.. what remains the same?

thanks and can u explain y please?

--- End quote ---
empirical formula.
empirical formula of ethene is C2H4
Since polyethene is just ethene molecules repeating, the empirical formula is the same.

Ghost Of Highbury:
the empirical formula is the same

but the structural formula is different

Wahab09:
but the molecular formula is still C2H4 it didnt change also?

....:

--- Quote from: Wahab09 on June 11, 2009, 05:48:19 pm ---but the molecular formula is still C2H4 it didnt change also?

--- End quote ---
It is just like, if you join four molecules of ethene to form polyethene, the molecular formula is like C8H16, but empirical formula isn't C8H16

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