Draw the electron dot structures for:
$(a)$ Ethanoic acid
$(b)$ $H_2S$

(N/A) The electron dot structure of ethanoic acid $(CH_3COOH)$ involves sharing of electrons between carbon,hydrogen,and oxygen atoms to complete their octets/duplets.
(See the provided image for the structural representation).
$(b)$ The electron dot structure of hydrogen sulfide $(H_2S)$ involves the sulfur atom sharing one electron each with two hydrogen atoms to form two covalent bonds,completing the octet of sulfur and the duplet of hydrogen.
(See the provided image for the structural representation).