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How can a chemical equation be made more...

How can a chemical equation be made more informative ?

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(a) By indicating the physical states of the reactants and products
(b) By using an upward arrow to indicate the evolution of a gaseous product
(c) By using a cownward arrow to indicate the formation of a precipitate
(d) By indicating the aqueous solutions as (aq.)
(e) By indicating the energy changes
`C_(6)H_(12)O_(6)(s)+6O_(2)(g)to6CO_(2)(g)+6H_(2)O(l)+"energy"`.
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