Question 5(a)(i)
[Maximum number: 1]
This question is about organic compounds.
The diagram shows the displayed formula of methanoic acid.
Give the total number of atoms in one molecule of methanoic acid.
Edexcel IGCSE Chemistry 4.35C carboxylic acid formulae
Practise carboxylic-acid formula questions by drawing displayed formulae, naming acids and calculating chain information from Mr.
How this is tested
- Draw displayed formulae for unbranched carboxylic acids, showing the O-H bond.
- Calculate a CH2 chain value from Mr by subtracting end groups and dividing by 14.
- Use formula data to name methanoic or ethanoic acid and count atoms in a molecule.