Which of the following chemical formulas represents a molecule?

H2 CO2 SiO2 NH3

CO2 is a chemical formula that is representing a molecule.

Explanation:

A chemical formula is used to represent molecules in a particular element. Molecules are basically shown by the symbols  present in the periodic table. As we know that CO2 is a chemical formula that is representing a molecule because , there are two elements one is carbon whose symbol is C and another element is oxygen whose symbol is O. So in the chemical formula there one carbon atoms and two oxygen atoms.

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.