How many moles in 5.080x10^16 molecules hydrogen?

Moles of hydrogen = 5.08 x 10^16
                                 
                                  6.02 x 10^23
         
                               =     8.43 x 10^-8 moles.

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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.