Most of the fuels used today are obtained from crude oil - Edexcel - GCSE Chemistry - Question 8 - 2019 - Paper 1
Question 8
Most of the fuels used today are obtained from crude oil.
(a) Which statement about crude oil is correct?
B crude oil is a mixture of hydrocarbons
(b) Crude oil i... show full transcript
Worked Solution & Example Answer:Most of the fuels used today are obtained from crude oil - Edexcel - GCSE Chemistry - Question 8 - 2019 - Paper 1
Step 1
State a use for kerosene.
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Answer
Kerosene is commonly used as fuel for aircraft, jets, lamps, and cooking.
Step 2
State a use for diesel oil.
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Answer
Diesel oil is primarily used as fuel for cars, buses, trucks, and generators.
Step 3
Choose a property and state how this property for kerosene compares with the property for diesel oil.
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Answer
A property that can be compared is boiling point. Kerosene has a lower boiling point than diesel oil.
Step 4
Explain, using these formulae, why butane and pentane are neighbouring members of the same homologous series.
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Answer
Butane (C4H10) and pentane (C5H12) differ by one carbon atom and two hydrogen atoms. They share the same general formula CnH2n+2, which indicates that they are part of the same homologous series of alkanes.
Step 5
Calculate the mass of carbon in 100 g of butane.
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The formula for butane is C4H10. In one molecule of butane, there are 4 carbon atoms. To find the mass of carbon in 100 g of butane, we first calculate the mass of carbon in one mole of butane, which is:
4 *(12.0 ext{ g/mol}) = 48.0 ext{ g}
Then, we find the mass of carbon in 100 g of butane:
