This is about different forms of carbon - AQA - GCSE Chemistry - Question 3 - 2022 - Paper 1
Question 3
This is about different forms of carbon.
Figure 5 represents the structure of diamond.
Figure 5
Key
⚪ Carbon atom
Describe the structure and bonding of diamond.... show full transcript
Worked Solution & Example Answer:This is about different forms of carbon - AQA - GCSE Chemistry - Question 3 - 2022 - Paper 1
Step 1
Describe the structure and bonding of diamond.
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Answer
Diamond has a giant covalent structure, often referred to as a macromolecular lattice. Each carbon atom in diamond forms four covalent bonds with other carbon atoms, creating a rigid three-dimensional structure. This extensive network of bonds gives diamond its remarkable hardness.
Step 2
Explain why diamond has a very high melting point.
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Answer
The strong covalent bonds in diamond require a considerable amount of energy to break. Many of these bonds must be disrupted for the crystal structure to melt, which results in diamond having a very high melting point.
Step 3
What is the name of this type of molecule? Tick (✓) one box.
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Answer
Fullerene
Step 4
Suggest one reason why the C₇₀ molecule is suitable for this use.
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Answer
The C₇₀ molecule is hollow, which allows it to act as a cage for transporting drugs.
Step 5
Calculate the number of C₇₀ molecules that can be made from one mole of carbon atoms.
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Answer
To find the number of C₇₀ molecules from one mole of carbon atoms, we use the equation:
