HEY I NEED A ANSWER RIGHT NOW IT'S MISSING AND MY TEACHER ARE GRADING THEM NOW YOU WILL BE MARKED BRAINLIEST

Note:- For tabular way solution refer to the first one .Here I do a simple way to let you understand better
Let's do
Balanced equation is given by
[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]
Moles of O_2:-
Moles of Fe_2O_3
Mass of Fe_2O_3