Some medicines include the magnesium salt of a fatty acid. Fatty acids are part of the homologous series of carboxylic acids and have one carboxylic acid group. State the carboxylic acid functional group and how many moles of a fatty acid react with 1 mole of magnesium?
- A$-\text{CO}_2\text{H}$, $1$
- B$-\text{CO}_2\text{H}$, $2$
- C$-\text{CH}_2\text{OH}$, $1$
- D$-\text{CH}_2\text{OH}$, $2$