When the oxide of generic metal M is heated at 25.0 ∘ C , a negligible amount of M is produced. MO 2 ( s ) − ⇀ ↽ − M ( s ) + O 2 ( g ) Δ G ∘ = 291.0 kJ mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What is the chemical equation of this coupled process? Show that the reaction is in equilibrium. Include physical states and represent graphite as C ( s ) .

The chemical equation after coupling both reaction :

Explanation:

.....[1]

..[2]

The chemical equation after adding both the reactions :

[1] + [2] :

The chemical equation of this coupled process:

air

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then a couple days later you check the air pressure in the tire

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alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".