1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ludmilkaskok [199]
3 years ago
14

At equilibrium, the concentrations in this system were found to be [ N 2 ] = [ O 2 ] = 0.200 M and [ NO ] = 0.600 M . N 2 ( g )

+ O 2 ( g ) − ⇀ ↽ − 2 NO ( g ) If more NO is added, bringing its concentration to 0.900 M, what will the final concentration of NO be after equilibrium is re‑established?
Chemistry
1 answer:
alexandr1967 [171]3 years ago
8 0

Answer:

0.78 M

Explanation:

First, we need to know which is the value of Kc of this reaction. In order to know this, we should take the innitial values of N2, O2 and NO and write the equilibrium constant expression according to the reaction. Doing this we have the following:

N2(g) + O2(g) <------> 2NO(g)   Kc = ?

Writting Kc:

Kc = [NO]² / [N2] * [O2]

Replacing the given values we have then:

Kc = (0.6)² / (0.2)*(0.2)

Kc = 9

Now that we have the Kc, let's see what happens next.

We add more NO, until it's concentration is 0.9 M, this means that we are actually altering the reaction to get more reactants than product, which means that the equilibrium is being affected. If this is true, in the reaction when is re established the equilibrium, we'll see a loss in the concentration of NO and a gaining in concentrations of the reactants. This can be easily watched by doing an ICE chart:

      N2(g) + O2(g) <------> 2NO(g)

I:      0.2        0.2                 0.9

C:     +x         +x                   -2x

E:    0.2+x    0.2+x             0.9-2x

Replacing in the Kc expression we have:

Kc =  [NO]² / [N2] * [O2]

9 = (0.9-2x)² / (0.2+x)*(0.2+x)   ----> (this can be expressed as 0.2+x)²

Here, we solve for x:

9 = (0.9-2x)² / (0.2+x)²

√9 = (0.9-2x) / (0.2+x)

3(0.2+x) = 0.9-2x

0.6 + 3x = 0.9 - 2x

3x + 2x = 0.9 - 0.6

5x = 0.3

x = 0.06 M

This means that the final concentration of NO will be:

[NO] = 0.9 - (2*0.06)

[NO] = 0.78 M

You might be interested in
Hydrogen and oxygen atoms react to form water by __________ electrons.
DedPeter [7]
D
Sharing
Formation of water is a covalent bond which involves the sharing of electrons between two reacting atoms so that both can attain the stable octet structure
4 0
2 years ago
Please help! you are amazing! also brainliest :)
Ede4ka [16]

im pretty sure its A if i did all my reasearch right.

hope this helps luv. <3

8 0
3 years ago
Read 2 more answers
How do ocean currents (specifically ocean gyres) impact climate
Alex73 [517]

Answer:

Because ocean currents circulate water worldwide, they have a significant impact on the movement of energy and moisture between the oceans.

Explanation:

8 0
3 years ago
Read 2 more answers
What is the numbers to the C02
andriy [413]

Answer:

413.20 ppm

Explanation:

4 0
2 years ago
Which element(s) is/are not balanced in this equation?
maks197457 [2]
The answer is d because in both sides there are 1 magnesiums 1 oxygens 2 lithiums and 2 chlorines
6 0
3 years ago
Read 2 more answers
Other questions:
  • A species whose oxidation number increases in a reaction is
    13·1 answer
  • You are trying to determine the specific heat of a metal. You heat the 97 g piece of metal to 100 °C and place it in a calorimet
    13·1 answer
  • Which element is least likely to form chemical bonds?
    12·2 answers
  • Ethylene glycol (antifreeze) has a density of 1.11 g/cm3. what is the volume in liters of 3.46 kg of ethylene glycol?
    11·1 answer
  • Li Ming thinks that chlorophyll is a reactant of photosynthesis, but her classmate Julian disagrees. Who is correct, and why?
    9·2 answers
  • What are valence electrons of an atom used for?
    6·1 answer
  • Help with science----?????///
    15·1 answer
  • When you test starch with Barfoed’s reagent, what would be the answer, positive or negative?
    13·1 answer
  • The equation for molarity, M , is
    9·1 answer
  • Consider the following balanced thermochemical equation for a reaction sometimes used for H₂S production: 1/8 S₈(s) + H₂(g) → H₂
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!