The the molecular formula of the first member of a certain group of organic compounds is CH2O(HCHO). Determine the name and molecular formula of the third member of this group if members of this group are in homologous series. What is the general name for this group of organic compounds?

The the molecular formula of the first member of a certain group of or

1.	The the molecular formula of the first member of a certain group of organic compounds is CH2O(HCHO). Determine the name and molecular formula of the third member of this group if members of this group are in homologous series. What is the general name for this group of organic compounds?
Answer» Methanoic ACID and CH3COOH