What is the mass of 8.03 x 1024 24 formula units of barium nitrate?

Chemistry do these i am so stressed i have 14 essays due tomorrow

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What layer of the atmosphere is directly above the troposphere?