2 upper N upper o upper c l double-headed arrow 2 upper N upper O (g) plus upper C l subscript 2 (g).

At equilibrium, the concentrations are as follows.

[NOCl] = 1.4 ´ 10–2 M

[NO] = 1.2 ´ 10–3 M

[Cl2] = 2.2 ´ 10–3 M

What is the value of Keq for the reaction expressed in scientific notation?

1.6 ´ 10–5

6.2 ´ 10–4

6.2 ´ 104

1.6 ´ 105

1.6x10^–5

Explanation:

Step 1:

The balanced equation for the reaction.

This is illustrated below:

2NOCl <=> 2NO + Cl2

Step 2:

Data obtained from the question.

[NOCl] = 1.4x10^–2 M

[NO] = 1.2x10^–3 M

[Cl2] = 2.2x10^–3 M

Equilibrium constant, K =?

Step 3:

Determination of the equilibrium constant.

The equilibrium constant for the above equation can be written as:

K = [NO]^2 [Cl2] / [NOCl]^2

Inputing the values of the [NO], [Cl2] and [NOCl], the equilibrium constant is:

K = [NO]^2 [Cl2] / [NOCl]^2

K = (1.2x10^–3)^2 x (2.2x10^–3) / (1.4x10^–2)^2

K = 1.6x10^–5

A

Explanation:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.