Respuesta :

evgeniylevi

Answer:

7,72Е24

Explanation:

if one mole is 6.022*10²³, then 6.41 moles are: 6.41*6.022*10²³*2=2*3.86*10²⁴=7.72E24 (atoms).

PS/ Formula of Br is Br₂.

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