Types of formula for organic molecules
3 marks · Easy(a)[1 mark]
Draw the displayed formula of methane.
(b)[1 mark]
Write the molecular formula of methane.
(c)[1 mark]
Give the empirical formula of methane.
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.
Show answer
(a) — · must show C atom with 4 single bonds to H atoms
(b) CH4
(c) CH4
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · 1 mark for a correct displayed formula: a central carbon atom with four single bonds to hydrogen atoms
B2 (b) · 1 mark · 1 mark for correct molecular formula: CH4
B3 (c) · 1 mark · 1 mark for correct empirical formula: CH4
Worked solution
a) The displayed formula of methane:
b) The molecular formula is CH4.
c) The empirical formula is also CH4.