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4 marksKinetic Theory

CAPE Chemistry Unit 1 · 2014 · Paper 2 · Question 4(c)

A gas with a mass of 0.299 g was collected in a 400 cm³ container at a pressure of 4.2 × 10⁴ Pa and a temperature of 25 °C. R = 8.31 J K⁻¹ mol⁻¹.

Calculate the relative molecular mass (Mᵣ) of the gas.

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Other parts of this question

  1. 4(a)(i)State the electronic configuration of carbon in its ground state using sp notation.[1 mark]
  2. 4(a)(ii)Account for the number and type of orbitals around EACH carbon atom in a molecule of ethane.[3 marks]
  3. 4(a)(iii)Use the VSEPR theory to deduce the arrangement of the orbitals and the bond angles around EACH carbon atom in a molecule of dichloroethane, CH₂ClCH₂Cl.[3 marks]
  4. 4(b)(i)State THREE assumptions of the kinetic theory as it pertains to ideal gases.[3 marks]
  5. 4(b)(ii)Under what conditions of temperature and pressure will a real gas deviate from ideal gas behaviour?[1 mark]

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