In the reaction:

NH3 + H2O ↔ NH4+ OH–

The two Brönsted acids are
A) NH3 and H2O
B) NH3 and OH–
C) NH4+ and H2O
D) NH4+ and OH–

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]