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10 Cards in this Set
- Front
- Back
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What is a hydrocarbon? |
A molecule made from hydrogen and carbon atoms. |
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Explain how crude oil is separated? |
It is separated by using a fractional distillation tower. |
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what is the word and symbol equation for complete combustion? |
CH4 + 2O2 ----- Co2 + 2H2O
Methane + oxygen = carbon dioxide + water. |
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Name the main gasses in the air and give percentages. |
Oxygen - 20.947%
Nitrogen - 78.084%
Argon - 0.934%
Carbon dioxide - 0.035% |
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How do you test for Alkenes? |
Use a bromine solution and combine the alkene, it should decolourise, if it dosent then you have an alkane. |
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What is a polymer? |
A long strand of hydrocarbons? |
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How is Gore-Tex both waterproof and breathable? |
The PTFE is hydrophobic which means that it is water retardant but water vapour from the opposite side of the PTFE can penetrate the outer layer. |
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How does an emulsifier work? |
The emulsifier has a hydrophobic and a hydrophilic end which helps it to combine oil and water. |
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Give the balanced symbol equation for thermal decomposition of baking powder? |
2NaHCO3 ------ Na2CO3 + CO2 + H2O. |
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Why are Akanes defined as being 'saturated'? |
Alkanes are saturated, ie. they do not have a carbon-to-carbon double bond, and so do not undergo this addition reaction. |
