The following data was collected for the formation of ammonia (NH3) based on the following overall reaction: N2 + 3H2 = 2NH3 N2 (M) H2 (M) Initial Rate (M/min.) 0.10 0.10 0.0021 0.10 0.20 0.0084 0.20 0.40 0.0672 What is the unit for the rate constant in the rate law for the formation of ammonia? Choose ONLY ONE and indicate your answer for this question on the exam answer sheet. a. M/min. b. 1/min

Answer :  The unit for the rate constant in the rate law for the formation of ammonia is,

Explanation :

Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

For the given chemical equation:

Rate law expression for the reaction:

where,

a = order with respect to

b = order with respect to

Expression for rate law for first observation:

....(1)

Expression for rate law for second observation:

....(2)

Expression for rate law for third observation:

....(3)

Dividing 2 by 1, we get:

Dividing 3 by 1 and also put value of b, we get:

Thus, the rate law becomes:

Now, calculating the value of 'k' by using any expression.

The value of the rate constant 'k' for this reaction is

That means, the unit for the rate constant in the rate law for the formation of ammonia is,

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

the awnser is group 12