Which is not a characteristic of a compound? 1.different samples have different properties
2.can be represented by a chemical formula
3.a pure substance made of two or more elements
4.has different properties from its component elements

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.

A. ​it generates energy from carbohydrates.b. it requires activation by oxygen.​c. ​it is used by cells to dispose of excess electrons

They make up examples of physical properties 

Answer//the law of conservation of mass.;