answer; ///i believe the correct answer is (c) 8byte; //////////
it would be best to ask other students what the instructor means because they may understand. but if they do not understand either you should raise more specific questions on what you don't understand to get the full concept if the situation. but it matters on the situation to get the right answer which is only an opinion. but i think a and b would be the best answer.
4fes₂ + 11o₂ = 2fe₂o₃ + 8so₂↑
n(fes₂) = m(fes₂)/m(fes₂) = 6000/120 = 50 моль
по уравнению реакции - n(o₂) = (11*n(fes₂))/4 = (11*50)/4 = 137,5 моль
v(o₂) = n(o₂)*vm = 137,5*22,4 = 3080 л
ответ: v(o₂) = 3080 л
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