3. (05.05 LC) Consider the reaction 4FeS2 + 1102 - 2Fe2O3 + 8502. If 8 moles of FeS2 react with 15 moles of Oz, what is the limiting reactant? (3 points)
FeS2
O Fe₂O₃
002
O SO2

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

The answer is 1.82 j/g°c                  

Answerhund's rule;

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.