Each compound and element present in air has its own atomic or molecular mass. Determine the molecular mass of each of these substances. Be sure to write out your calculations to show how you found them.
a. Nitrogen (N2)
b. Oxygen (O2)
c. Argon (Ar)
d. Carbon dioxide (CO2)

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.

They are all solids.

I’m not sure about this question

Answerlimiting reactant;