Which formula equation shows a reversible reaction? a. 2na+f2–> 2naf b. caco3–> cao+co2 c. nh4ci(s)—–nh3(g.+hci(g. 2h2o2(aq)–pt—> 2h2o(i)+o2(g.?

Explanation:

The formula equations given are:

        [there is also a Pt symbol over the arrow, which means that Pt

          is a catalyst]

Reversible reactions are reactions that may happen in both directions, i.e. there is a direct or forward reaction and a reverse reaction.

The symbol used to show a reversible reaction is the double arrow (⇄).

The double arrow shows tha both left side substances and right side substances are reactants and products.

In the reaction NH₄CI(s) ⇄ NH₃(g) + HCI(g) you have:

All the other equations are written with a single arrow, so they are not reversible reactions.

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