4. Ammonia reacts with oxygen to form nitrogen dioxide and steam 4 NH3 (g) + 7 O2(g) → 4 O-N=O (9) + 6H20 (9)
Calculate the delta H, using the Bond dissociation energies.

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

This is a solution, hope i could

Iron reacts with oxygen in a chemical hand-warmer. how should this reaction be categorized? the correct answer is: a). as an exothermic process because it releases heat