A chemical equation does not tell us

Options

A. the physical states of the rectants and products
B. the special conditions required for some reactions
C. how long it will take for the change to occur
D. which chemical bonds are broken and which new ones are formed.

Answer

C

Explanation

Normally the rusting of an iron nail would take weeks or months. On the other hand, iron (III) oxide can be formed within seconds when iron is burned in oxygen. Yet both of within secounds when irons is burned in oxygen. Yet both of these chemical changes are represented by the same equation:
`4Fe(s) + 3O_(2) (g) rarr 2Fe_(2) O_(3) (s)`