Coding for the type of compound
4 marks · NormalState the code letter for a six-carbon chain in organic chemistry.
Give the name and molecular formula for the alkane with six carbon atoms.
Explain why the arrangement of atoms may be drawn differently but still represent the same compound.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) hex
(b) hexane, C6H14
(c) Because the molecule can be rotated or flipped; different drawn structures can represent the same molecule.
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Marking points
B1 (a) · 1 mark · Gives correct code letter: 'hex'
B2 (b) · 1 mark · Gives correct name hexane
B3 (b) · 1 mark · Gives correct molecular formula: C6H14
B4 (c) · 1 mark · Explains that structural formulae can look different due to the molecule being flipped or rotated, but represent the same compound
Worked solution
a) The code letter for a six-carbon chain is 'hex'.
b) The name of the alkane is hexane; its molecular formula is C6H14.
c) Because the atoms can be drawn in different arrangements when the molecule is flipped or rotated, but it is still the same compound.