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    (Original post by kefalos23)
    What are the properties of hydrocarbons as the chain gets smaller?
    They get less gloopy, are more flammable and not as smokey when burnt.
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    Finally: What is the name of the bonding between carbons and hydrogen and how strong is it?
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    (Original post by IAmAnTroll)
    Apparently the 6 marker is on quarrying advs + disadvs
    hey, how do you know that???
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    (Original post by IAmAnTroll)
    Does methene exist? Explain why. (2 marks)
    No, this is because it alkenes have a double bond, methene cannot double bond to another hydrocarbon because that will make it ethene, so in conclusion because it doesnt have another carbon atom to double bond to
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    (Original post by IAmAnTroll)
    Explain how earthquakes occur. (3 marks)
    When plates move alongside each other, friction builds up between the plates. When the pressure is too much, a sudden jerk causes lots of energy to be released in the form of an earthquake.
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    (Original post by kefalos23)
    Finally: What is the name of the bonding between carbons and hydrogen and how strong is it?
    Covalently bonded and the bond isnt that strong? not too sure
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    (Original post by whyaqawhy)
    THe theory that the solution of amino acids (building blocks of life) led to development of molecules and organisms. This was caused by the reaction (with lightning) with the gases in the earths early atmosphere.
    Almost there!
    Remember to mention about that it needed hydrocarbons and ammonia (be more specific than gases) good luck in your exams
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    (Original post by whyaqawhy)
    Firstly why would you add the oil to water in first place? Im pretty sure the water is distilled and dont have to mention anything at all about denseness its not a big complicated process.
    Right, fair enough then.

    My bad, sorry xD

    So, what is the process again?
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    -Less viscous, easy to ignite, low boiling point and very flammable
    (Original post by kefalos23)
    What are the properties of hydrocarbons as the chain gets smaller?
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    (Original post by Obnox)
    Why is cooking foods in oil better then cooking foods in water? (1 mark)
    Explain how emulsifiers work?(3 or 4 marks)
    Describe the Miller-Urey experiment(4 marks)
    Oil has a much higher boiling point - can cook food to a higher temp.

    Emulsifiers have a hydrophillic(attatches to water) end and hydrophobic end(attatches to oil). This causes the oil and water molecules to be joined together by the emulsion molecules forming a stable emulsion once mixed/shaked. - arr idk about this q much get so confused help me out on improving this thx.

    miller and urey used ammonia,carbon dioxide, water vapour and methane (representative of earths early atmosphere gases) and passed the gasses through a spark (that simulated lightning). This represented earths early atmosphere(from what we believe) and was discovered that the solution produced contained amino acids( building blocks of life) - which was known as the primordial soup.
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    (Original post by Obnox)
    Covalently bonded and the bond isnt that strong? not too sure
    Covalent bonds are super strong!
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    How is copper extracted from copper sulphate using scrap iron and why is scrap iron used in the process?
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    (Original post by t10r)
    Right, fair enough then.

    My bad, sorry xD

    So, what is the process again?
    its called extracting plant oils - its easy
    crush seeds - distill water from solution - leaving oil
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    (Original post by Obnox)
    Covalently bonded and the bond isnt that strong? not too sure
    I think it's very strong as covalent bonds are strong and also, you need a high temperature and a catalyst to crack a hydrocarbon so that would suggest that the bond is strong.
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    (Original post by MBK14)
    What would happen if it said suggest one reason and you put like 3


    Posted from TSR Mobile
    From the mark scheme:
    "This applies to questions requiring a set number of responses, but for which students have provided extra responses. The general principle to be followed in such a situation is that ‘right + wrong = wrong’."
    So you just have to hope all of your responses were correct.
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    (Original post by Cirsium)
    Covalent bonds are super strong!
    o yeah oops
    • Thread Starter
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    (Original post by Love123443)
    -Less viscous, easy to ignite, low boiling point and very flammable
    very flammable
    very volatile
    very runny
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    (Original post by GeorgeMillerr)
    Almost there!
    Remember to mention about that it needed hydrocarbons and ammonia (be more specific than gases) good luck in your exams
    WHat was the significance of hydrocarbons?
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    (Original post by whyaqawhy)
    WHat was the significance of hydrocarbons?
    "One theory as to how life was formed involvesthe interaction between hydrocarbons,ammonia and lightning. HT onlyCandidates should be aware of the Miller-Ureyexperiment and the ‘primordial soup‘ theory, butthey should know that this is not the only theory"
    AQA 2014 Specification
    I don't know the significance but I just obey the specification
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    (Original post by whyaqawhy)
    Oil has a much higher boiling point - can cook food to a higher temp.

    Emulsifiers have a hydrophillic(attatches to water) end and hydrophobic end(attatches to oil). This causes the oil and water molecules to be joined together by the emulsion molecules forming a stable emulsion once mixed/shaked. - arr idk about this q much get so confused help me out on improving this thx.

    miller and urey used ammonia,carbon dioxide, water vapour and methane (representative of earths early atmosphere gases) and passed the gasses through a spark (that simulated lightning). This represented earths early atmosphere(from what we believe) and was discovered that the solution produced contained amino acids( building blocks of life) - which was known as the primordial soup.
    An emulsifier has a hydrophilic HEAD and a hydrophobic TAIL (be specific about the head and tail, it was on a mark scheme for some reason idk), which allows the oil and water to mix together as the head dissolves in the water as it likes water and the tail dissolves in the oil as it hates water. Therefore they mix together and the emulsion is stabilised.
 
 
 
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