GCSE Q Pleaasee help meeee Watch

artymaniac
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can someone explain to me the answer of these gcse questions in detail so I understand the meaning behind the answers.. much appreciated xxxxxxx
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lou987
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2b (i) carbon monoxide
2b(ii) they are different because of incomplete combustion in reaction 2 or complete combustion in reaction 1. Complete Combustion is where the reaction has sufficient amount of oxygen. hope this helps.
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DashStrike
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Basically this question is presenting you with two situation that happen when hexane is burnt in NORMAL air.

Situation 1 (reaction 1): Hexane undergoes COMPLETE combustion producing CO2 (carbon DIoxide) and water
Situation 2 (reaction 2): Hexane undergoes INCOMPLETE combustion producing CO (carbon MONoxide) and water

When hexane is burnt in NORMAL air, there isn't enough oxygen for the complete combustion of ALL hexane, therefore SOME hexane will undergo incomplete combustion, producing carbon monoxide. Basically, in normal air there isn't enough oxygen for complete combustion of all the molecule, so some incomplete combustion also takes place.
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artymaniac
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(Original post by DashStrike)
Basically this question is presenting you with two situation that happen when hexane is burnt in NORMAL air.

Situation 1 (reaction 1): Hexane undergoes COMPLETE combustion producing CO2 (carbon DIoxide) and water
Situation 2 (reaction 2): Hexane undergoes INCOMPLETE combustion producing CO (carbon MONoxide) and water

When hexane is burnt in NORMAL air, there isn't enough oxygen for the complete combustion of ALL hexane, therefore SOME hexane will undergo incomplete combustion, producing carbon monoxide. Basically, in normal air there isn't enough oxygen for complete combustion of all the molecule, so some incomplete combustion also takes place.
Thanks for the explanation, makes it muuuuch easier to understand, appreciate ur help :-)
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artymaniac
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(Original post by lou987)
2b (i) carbon monoxide
2b(ii) they are different because of incomplete combustion in reaction 2 or complete combustion in reaction 1. Complete Combustion is where the reaction has sufficient amount of oxygen. hope this helps.
thank ya
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DashStrike
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(Original post by artymaniac)
Thanks for the explanation, makes it muuuuch easier to understand, appreciate ur help :-)
You're welcome I'm here if you need any more help
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artymaniac
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(Original post by DashStrike)
You're welcome I'm here if you need any more help
Hi me again!, I was just revising polymerisation and was wondering if u could help.. me does polymerisation essentialy turn alkenes into alkanes??
thanxin advance
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DashStrike
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(Original post by artymaniac)
Hi me again!, I was just revising polymerisation and was wondering if u could help.. me does polymerisation essentialy turn alkenes into alkanes??
thanxin advance

No. Alkenes break their double bond and join together in a big chain (biiiiiiiiiiiiiiig chain). The chain is not an alkAne chain, it is a polyalkEne chain. For example, polymerisation of ethEne produces polyethEne.

I hope this helped
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artymaniac
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(Original post by DashStrike)
No. Alkenes break their double bond and join together in a big chain (biiiiiiiiiiiiiiig chain). The chain is not an alkAne chain, it is a polyalkEne chain. For example, polymerisation of ethEne produces polyethEne.

I hope this helped
Ahh I see, Im trying to draw this big chin for polyethene but im puzzled how to do it.. ive tried various sites but they r confusing me. In front of me I have an ethene chain.. but what do I do next?
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Jargonium
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(Original post by artymaniac)
Ahh I see, Im trying to draw this big chin for polyethene but im puzzled how to do it.. ive tried various sites but they r confusing me. In front of me I have an ethene chain.. but what do I do next?
This.
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Jargonium
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(Original post by Jargonium)
This.
Note that "n" is your really big number.
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artymaniac
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(Original post by Jargonium)
Note that "n" is your really big number.
oh! I get it now! thank u for helping
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Jargonium
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(Original post by artymaniac)
oh! I get it now! thank u for helping
No problem!

If you need any more assistance just ask
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artymaniac
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(Original post by Jargonium)
No problem!

If you need any more assistance just ask
Thank you ur very kind! much appreciated :-)
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DashStrike
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(Original post by artymaniac)
Thank you ur very kind! much appreciated :-)
Make sure the brackets are round and the lines go from inside to the outside. -(-CH2CH2-)-
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