Which formula represents an unsaturated hydrocarbon? picture i
how many pairs of electrons are shared between the two nitrogen atoms? picture ii
i need explanation for both questions, me! : )

Unsaturated hydrocarbon: C because there is C=C in the molecule
1 pair of electrons

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.