PLEASE HELP Pure substances are

Alloys. And can be represented by one chemical symbol

Elements and can be represented by one chemical symbol

Mixtures and can be represented by two or more chemical symbols

Solutions and can be represented by two or more is chemical symbols

Herbivores, carnivores, omnivores, decomposers, herbivores

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.