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
pochemuha
3 years ago
5

A reaction is second order respect to the reactant A. If the reaction is 85% complete in 12 minutes, how long would it take for

the reaction to be 15% complete?
a. 110s
b. 27s
c. 62s
d.130s
e. 22s
Chemistry
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

e. 22s

Explanation:

Initial Concentration = 100

Final concentration = 15 ( Since the reaction is 85% complete)

Time = 12 minutes = 720 seconds

The integrated rate law for second order reactions is given as;

1 / [A] = (1 / [A]o) + kt

Making k subject of interest, we have;

kt = (1 / [A] ) - (1 / [A]o )

k = (1 / [A] ) - (1 / [A]o ) / t

k = [(1/ 15) - (1 / 100) ] / 720

k = (0.0667 - 0.01 ) / 720

k = 0.0567 / 720

k = 7.875e^-5

How long would it take for the reaction to be 15% complete?

Final concentration = 85 (Since the reaction would be 15% complete)

The integrated rate law for second order reactions is given as;

1 / [A] = (1 / [A]o) + kt

Making t subject of interest, we have;

kt = (1 / [A] ) - (1 / [A]o )

t = (1 / [A] ) - (1 / [A]o ) / k

t = [(1 / 85 ) - (1 / 100) ] / 7.875e^-5

t = (0.0117 - 0.01 ) / 7.875e^-5

t = 0.001765 / 7.875e^-5

t = 22.41 seconds

Corect option = E.

You might be interested in
The ease with which a raw material can be molded , flattened , or bent is known as its ?
Leya [2.2K]
A. Malleability

Ductility is being able to be drawn into wires
Elasticity is being able to resist stress
Resilience is being able to spring back into shape (kind of like elasticity)
6 0
3 years ago
Read 2 more answers
HEEEEEEEEEEEEEEELLLLLLLLLLLLPPPPPPP!!!!!!! I WILL MARK BRAINLIEST IF YOU HELP!!!!THIS IS DUE SOON!
Hitman42 [59]

Answer:

An ice pack uses friction and the chemicals inside make it mix to make it cold

Explanation:

3 0
3 years ago
What is the relationship between the concentration of particles in a solution and the solution’s vapor pressure? As solute conce
kap26 [50]

Answer:

As solute concentration increases, vapor pressure decreases.  

Step-by-step explanation:

As solute concentration increases, the number of solute particles at the surface of the solution increases, so the number of <em>solvent </em>particles at the surface <em>decreases</em>.

Since there are fewer solvent particles available to evaporate from the surface, the vapour pressure decreases.

C. and D. are <em>wrong</em>. The vapour pressure depends <em>only</em> on the number of particles. It does not depend on the nature of the particles.

5 0
2 years ago
Read 2 more answers
Balence the following equation : _____ NH3 --------&gt; _____ N2 + _____ H2
Ksenya-84 [330]

2 NH3 -> 1 N2 + 3 H2

Explanation:

That would be the answer to this

8 0
3 years ago
Does Mg or Ne have a higher electronegativity value
elena55 [62]

Answer:

Ne

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • After swimming in the pool on a very hot day, Sarah had a glass of ice water. Over time, the water on her skin evaporated, and t
    11·2 answers
  • A piece of sodium metal reacts completely with water to produce sodium hydroxide and hydrogen gas. the hydrogen gas generated is
    12·1 answer
  • How do you calculate the abundance of an atom and the relative atomic maths? As simply as possible?
    7·1 answer
  • Definition: This is the phase of matter with no fixed shape or volume.
    14·2 answers
  • 1) Which action defines a double-displacement reaction?
    5·2 answers
  • What is the total number of distinct 13C NMR signals that may be observed for the product, methyl-3-nitrobenzoate, and for the r
    13·1 answer
  • The electronic arrangement of an atom shows how electrons are distributed across the different energy levels. Which of the follo
    6·1 answer
  • How many is 10+24x+39x=3
    8·1 answer
  • When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is ta
    7·1 answer
  • Can someone pleas help
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!