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Crude oil is a mixture of hydrocarbons - Edexcel - GCSE Chemistry - Question 3 - 2016 - Paper 1
Question 3
Crude oil is a mixture of hydrocarbons. It can be separated into fractions. (a) Which of these mixtures shows formulae of substances that could be in the gaseous f... show full transcript
Worked Solution & Example Answer:Crude oil is a mixture of hydrocarbons - Edexcel - GCSE Chemistry - Question 3 - 2016 - Paper 1
Step 1
Step 2
State which oil well contains the greatest combined total of diesel oil and fuel oil.
Answer
To calculate the combined totals:
- Oil well A: Diesel oil (7) + Fuel oil (26) = 33
- Oil well B: Diesel oil (10) + Fuel oil (28) = 38
- Oil well C: Diesel oil (16) + Fuel oil (30) = 46
Thus, oil well C contains the greatest combined total of diesel oil and fuel oil.
Step 3
State which oil well produces a crude oil containing the highest percentage of the high boiling point fractions.
Answer
High boiling point fractions in this context refer to fuel oil and bitumen. Calculating the percentages:
- Oil well A: Fuel oil (26) + Bitumen (58) = 84%
- Oil well B: Fuel oil (28) + Bitumen (27) = 55%
- Oil well C: Fuel oil (30) + Bitumen (1) = 31%
Therefore, oil well A produces crude oil containing the highest percentage of the high boiling point fractions.