Quelpr
3 marksMole Concept

CSEC Chemistry · January 2005 · Paper 2 · Question 3(a)(i)

Compounds A and B are two colourless liquids containing carbon, hydrogen, and oxygen. 4.0 g of B contains 60% carbon, 13% hydrogen, and 27% oxygen.

Calculate the empirical formula of B (Relative Atomic Mass: C = 12; O = 16; H = 1).

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 3(a)(ii)The empirical formula for A is CH₂O. Deduce whether or not A and B belong to the same homologous series. Explain your answer.[2 marks]
  2. 3(b)(i)Calculate the molecular formula for A and B. (The relative formula mass of both A and B = 60).[2 marks]
  3. 3(b)(ii)Compounds A and B both react with sodium. Write the fully displayed structural formulae for A and B.[4 marks]
  4. 3(c)(i)Describe ONE chemical test that can be used to distinguish between A and B.[2 marks]
  5. 3(c)(ii)Will both A and B be soluble in water? Give a reason for your answer.[2 marks]

More practice: the rest of this paper · more Mole Concept questions · all CSEC Chemistry past papers