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2.3 Properties of materials

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Question 36

R and S are hydrocarbons. Each molecule contains six carbon atoms, and all its bonds are single covalent bonds.

MoleculeArrangement of carbon atoms
RThe six carbon atoms are joined in one ring.
SOne carbon atom is bonded to three other carbon atoms. One of these three is bonded to two further carbon atoms. There are no rings.

Each carbon atom forms four covalent bonds. A single covalent bond contains one shared pair of electrons.

Calculate how many more electrons are shared in all the covalent bonds in one molecule of S than in one molecule of R.

[3]
Markscheme

2.3 Properties of materials Questions

  1. GCSE
  2. /Chemistry
  3. /2.3 Properties of materials

122 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.

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