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2.5 Types of substance

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Question 4
H

Graphene and buckminsterfullerene are forms of carbon. Graphene is used in some electronic devices. Buckminsterfullerene, C60\mathrm{C_{60}}C60​, is a molecule made of 60 carbon atoms arranged in a hollow sphere.

a.

Describe the structure of graphene.

[2]
b.

Explain why graphene conducts electricity.

[2]
c.

Buckminsterfullerene turns into a gas at a much lower temperature than graphite. Explain why.

[2]
d.

Poly(ethene) is a simple polymer made from carbon and hydrogen atoms. Describe the structure of poly(ethene).

[2]
e.

Calculate the mass, in grams, of one molecule of buckminsterfullerene. Relative atomic mass: C = 12. Avogadro constant = 6.02 × 1023 per mol

[2]
Markscheme

2.5 Types of substance Questions

  1. GCSE
  2. /Chemistry
  3. /2.5 Types of substance

48 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.

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