Calculate the mole fraction of nitric acid of a(n) 15.4% (by mass) aqueous solution of nitric acid. Calculate the mole fraction of nitric acid of a(n) 15.4% (by mass) aqueous solution of nitric acid. 5.21×10−2 2.50×10−2 5.00×10−2 0.100 The density of the solution is needed to solve the problem.

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.