Which of the following reactions could be an elementary reaction? 2 no2(g) + f2(g) → 2no2f(g) rate = k[no2][f2] h2(g) + br2(g) → 2 hbr(g) rate = k[h2][br2]1/2 no(g) + o2(g) → no2(g) + o(g) rate = k[no][o2] no2(g) + co(g) → no(g) + co2(g) rate = k[no2]2

The correct answer is

Explanation:

Molecularity of the reaction is defined as the number of atoms, ions or molecules that must colloid with one another simultaneously so as to result into a chemical reaction.

Order of the reaction is defined as the sum of the concentration of terms on which the rate of the reaction actually depends. It is the sum of the exponents of the molar concentration in the rate law expression.

Elementary reactions are defined as the reactions for which the order of the reaction is same as its molecularity and order with respect to each reactant is equal to its stoichiometric coefficient as represented in the balanced chemical reaction.

For the given reactions:

Molecularity of the reaction = 2 + 1 = 3

Order of the reaction = 1 + 1 = 2

This is not considered as an elementary reaction.

Molecularity of the reaction = 1 + 1 = 2

Order of the reaction =

This is not considered as an elementary reaction.

Molecularity of the reaction = 1 + 1 = 2

Order of the reaction = 1 + 1 = 2

This is considered as an elementary reaction.

Molecularity of the reaction = 1 + 1 = 2

Order of the reaction = 2 + 0 = 2

In this equation, the order with respect to each reactant is not equal to its stoichiometric coefficient which is represented in the balanced chemical reaction. Hence, this is not considered as an elementary reaction.

Hence, the correct answer is

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.