In writing expressions, the change of concentration will be divided by the change in time multiplied by their coefficient.
Remember that for rate of disappearance, the reactant side will have a negative sign while for rate appearance, we use positive sign.
Complete the expressions for the rate of appearance of products and the rate of disappearance of reactants in each of the following reactions. NOTE: add only minus signs and fractions where appropriate.
a) Cl2O2(g) → 2ClO(g)
b) N2O5(g) → NO2(g) + NO3(g)
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