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
Grace [21]
3 years ago
7

The rate constant for a certain reaction is k = 4.70×10−3 s−1 . If the initial reactant concentration was 0.700 M, what will the

concentration be after 4.00 minutes? Express your answer with the appropriate units.
Chemistry
1 answer:
Lynna [10]3 years ago
5 0

Answer:

Therefore the concentration of the reactant after 4.00 minutes will be 0.686M.

Explanation:

The unit of k is s⁻¹.

The order of the reaction = first order.

First order reaction: A first order reaction is  a reaction in which the rate of reaction depends only the value of the concentration of the reactant.

-\frac{d[A]}{dt} =kt

[A] = the concentration of the reactant at time t

k= rate constant

t= time

Here k= 4.70×10⁻³ s⁻¹

t= 4.00

[A₀] = initial concentration of reactant = 0.700 M

-\frac{d[A]}{dt} =kt

\Rightarrow -\frac{d[A]}{[A]}=kdt

Integrating both sides

\Rightarrow\int -\frac{d[A]}{[A]}=\int kdt

⇒ -ln[A] = kt +c

When t=0 , [A] =[A₀]

-ln[A₀]  = k.0 + c

⇒c= -ln[A₀]  

Therefore

-ln[A] = kt - ln[A₀]

Putting the value of k, [A₀] and t

- ln[A] =4.70×10⁻³×4 -ln (0.70)

⇒-ln[A]=  0.375

⇒[A] = 0.686

Therefore the concentration of the reactant after 4.00 minutes will be 0.686M.

You might be interested in
Help with this question I got so confused 30 points
frutty [35]

Answer:

B:the second answer

Explanation:

Because the all have leaves

6 0
3 years ago
Read 2 more answers
Which product has a bitter taste, is slippery when mixed with water, and can damage skin and eyes?
beks73 [17]

Answer:

sodium hydroxide

Explanation:

its a base and it can damage skin

7 0
3 years ago
Read 2 more answers
If a solution is saturated, which of these is true?
Fiesta28 [93]
If a solution is saturated, that means it already posses the maximum number of solutes thus have been dissolved in it, and thus the concentration cannot be increased.
8 0
3 years ago
Read 2 more answers
Car manufacturers use radiation for which task?
Lilit [14]

ANSWER: B) drying paint

EXPLANATION: Car manufacturers use UV radiation to dry the paint o the vehicle. The high reflectivity of infrared radiation helps to keep the car interior cool. It also gives advantages over convection heating. It can provide both high intensity and low intensity heat and is a low cost heat source when compared in dollars per unit of energy consumed. The IR heating also doesn't penetrate deeply and apply heating only on the outer surface.

4 0
4 years ago
Read 2 more answers
In the process of eukaryotic pre-mRNA splicing, how is the lariat intermediate formed?
Aleks [24]

Answer:

C

Explanation:

The Eukaryotic pre-mRNA receives a 5' cap and 3'poly(A) tail before Introns are removed and the mRNA is considered ready for translation.

4 0
3 years ago
Other questions:
  • A sample of an ionic compound that is often used as a dough conditioner is analyzed and found to contain 4.628 g of potassium, 9
    13·1 answer
  • Given the balanced equation representing a reaction at 101.3 kPa and 298 K:
    8·1 answer
  • How would lava that comes out of a Strato volcano be described most accurately
    10·2 answers
  • How do I round 10.25 to only 3 significant digits
    7·1 answer
  • Heat and pressure deep in the earth change shale to slate. Why does this happen?
    7·1 answer
  • Match the type of atomic bond with the correct definition.Ionic BondMatch the type of atomic bond with the correct definition.Io
    5·1 answer
  • In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____
    7·1 answer
  • Potassium chloride dissolved in pure water is an
    6·2 answers
  • In atomic solids where the lattice points are occupied by Group 8 ( 18) atoms, the atoms are held together by __________ forces.
    12·1 answer
  • 3) Determine the element of the lowest atomic number whose "ground state" contains:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!