2Al(S)+1.5O2(S)→Al2O3(s) H= -1676.0 KJ 2Fe + 1.5O2 (S) →Fe2O3(S)

Then the enthalpy change for the following equation is KJ

2Al + Fe2 O3(S) → 2Fe +Al2O3(s)
pls i dont have time

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

What type of context clue you understand the meaning of  quandary?