210 -- Which chemical formula is related to an ester and its name is correct? (1) $\text{H}-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{O}-\text{CH}_3$ , methyl acetate (2) $\text{C}_7\text{H}_5-\text{ONa}$ , sodium octanoate (3) $\text{CH}_3-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{ONa}$ , sodium acetate (4) $\text{CH}_3-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{O}-\text{CH}_2-\text{CH}_3$ , ethyl octanoate
\textbf{210 --} Which chemical formula is related to an ester and its name is correct?
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(1) $\text{H}-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{O}-\text{CH}_3$ , methyl acetate \hfill (2) $\text{C}_7\text{H}_5-\text{ONa}$ , sodium octanoate
(3) $\text{CH}_3-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{ONa}$ , sodium acetate \hfill (4) $\text{CH}_3-\overset{\displaystyle O}{\overset{\displaystyle \|}{C}}-\text{O}-\text{CH}_2-\text{CH}_3$ , ethyl octanoate
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