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
kaheart [24]
3 years ago
12

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.085 M, how long would it take u

ntil the concentration decreases to 0.055 M
Chemistry
1 answer:
olasank [31]3 years ago
5 0

Answer: It will take 8.2 minutes until the concentration decreases to 0.055 M

Explanation:

The time after which 99.9% reactions gets completed is 40 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{13min}=0.053min^{-1}

b)  Time taken for 0.085 M to decrease to 0.055 M

t=\frac{2.303}{0.053}\log\frac{0.085}{0.055}

t=8.2min

Thus it will take 8.2 minutes until the concentration decreases to 0.055 M

You might be interested in
Which statement is best supported by the information in the chart?
bezimeni [28]

Answer:

B

Explanation:

Because , it is the answer .

3 0
3 years ago
Read 2 more answers
Thats the guide to the project , someone help please 20 points
Fittoniya [83]

Answer:

do you want the whole project or just a part of it done ?

Explanation:

4 0
3 years ago
Read 2 more answers
What is hydrolysis of a salt and give an example​
GenaCL600 [577]

Answer:

Dissolving a salt of a weak acid or base in water is an example of a hydrolysis reaction. Strong acids may also be hydrolyzed. For example, dissolving sulfuric acid in water yields hydronium and bisulfate.

Explanation:

6 0
3 years ago
Is frying an egg chemical or physical change
max2010maxim [7]

It is a chemical change

3 0
3 years ago
Read 2 more answers
How many atoms are in 3.20 moles of carbon
DIA [1.3K]

Answer:

19.264×10^{23} atoms are present in 3.2 moles of carbon.

Explanation:

It is known that one mole of each element is composed of Avagadro's number of atoms. This is same for all the elements in the periodic table.

So, as 1 mole of any element = Avagadro's number of atoms = 6.02×10^{23} atoms

It is as simple as understanding a dozen of anything is equal to 12 pieces of that object.

As here the moles of carbon is given as 3.20 moles, the number of atoms in this mole can be determined as below.

1 mole of carbon = 6.02 ×10^{23} atoms

Then, 3.20 moles of carbon = 3.20 × 6.02 ×10^{23} atoms

Thus, 19.264×10^{23} atoms are present in 3.2 moles of carbon.

6 0
3 years ago
Other questions:
  • Why is the nacl extracted with water three times as opposed to only once?
    9·1 answer
  • Given the data calculated in Parts A, B, C, and D, determine the initial rate for a reaction that starts with 0.45 M of reagent
    9·1 answer
  • How many protons, neutrons and electrons are in these atoms?
    5·1 answer
  • What type of bonding is found in Al and P
    9·2 answers
  • What carries the useful energy of a lamp to its surroundings?
    10·1 answer
  • Antacid has a pH of 11. What does that tell you about its concentration of hydrogen ions? What does that tell you about its conc
    15·1 answer
  • 35. 124.31 g of silver nitrate reacts with 52.89 g of sodium chloride.
    14·1 answer
  • Plz help me asap i will die or else :c
    5·2 answers
  • How does freezing differ from deposition? ​
    10·1 answer
  • a student combined 45.3 ml of a 0.549 m calcium nitrate ca(no₃)₂ solution with 85.55 ml of a 1.321 m ca(no₃)₂ solution. calculat
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!