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
likoan [24]
3 years ago
9

The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the radioactive decay of the carbon-14

in a tiny sample of an artifact made of wood from an archeological dig is measured to be 19. Bq. The activity in a similar-sized sample of fresh wood is measured to be 20. Bq. Calculate the age of the artifact. Round your answer to 2 significant digits. years X 5 ?
Chemistry
1 answer:
Elena-2011 [213]3 years ago
6 0

Answer:

Age of the atifact is 4.2\times 10^{2} years

Explanation:

  • For first -order radioactive decay- A_{t}=A_{0}(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}
  • A_{t} represents activity of radioactive nuclide after t time, A_{0} represents initial activity of radioactive nuclide and t_{\frac{1}{2}} represents half-life
  • Here, A_{t}=19Bq, A_{0}=20Bq and t_{\frac{1}{2}}=5.73\times 10^{3}years

Plug-in all the given values in the above equation-

19=20\times (\frac{1}{2})^{\frac{t}{5.73\times 10^{3}}}

or, t=4.2\times 10^{2}

So, age of the atifact is 4.2\times 10^{2} years

You might be interested in
(50 POINTS!)
aleksandrvk [35]

Answer:

Can I get my 50 points now?

Explanation:

The helium is formed during the natural radioactive decay of elements such as uranium and thorium. These heavy elements were formed before the earth but they are not stable and very slowly, they decay. One mode of decay for uranium is to emit an alpha-particle.

7 0
3 years ago
Read 2 more answers
Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle?
Darina [25.2K]

Answer:

acetyl-CoA.

Explanation:

Fatty acids are broken down into acetyl-CoA by the process of beta-oxidation inside the mitochondrial matrix part of the powerhouse of the cell. Whereas fatty acids are synthesized from acetyl-CoA in the mitochondria.

Then acetyl-CoA which is produced by beta-oxidation enters the citric acid cycle in the mitochondrion by combining with oxaloacetate to form citrate and then complete the combustion of the acetyl-CoA into carbon dioxide and water.

4 0
3 years ago
Why can’t cold air hold much water vapor?
Andru [333]
Warm air can “hold” more water vapor than cool air because as the air warms its molecules move farther apart, making room for more molecules. This leads to the idea that as air cools its molecules move closer together, “squeezing” out water vapor.
4 0
3 years ago
50 POINTS!!!
8090 [49]

Answer:

Pressure = 4.81atm

Explanation:

Pressure = ?

Temperature = 20°C = (20 + 273.15)K = 293.15K

Volume = 2.50L

R = 0.082J/mol.K

n = 0.5mol

From ideal gas equation,

PV = nRT

P = pressure of the ideal gas

V = volume the gas occupies

n = number of moles of the gas

R = ideal gas constant and may varies due to unit of pressure and volume

T = temperature of the ideal gas

PV = nRT

Solve for P,

P = nRT/ V

P = (0.5 * 0.082 * 293.15) / 2.50

P = 12.01915 / 2.50

P = 4.807atm

P = 4.81atm

The pressure of the ideal gas is 4.81atm

3 0
3 years ago
Which statement describes streak?
Oliga [24]

Answer:

Streak is tested by scraping a mineral across plate

Explanation: Hope this helps :)

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which two properties are used to define matter?
    9·1 answer
  • a sample of concentrated nitric acid has a density of 1.41g/ml and contains 70.0% HNO3 by mass. what mass of HNO3 is present per
    11·1 answer
  • The best description for the original composition of the universe is _________​, __________, and _________
    14·1 answer
  • (Select all that apply)
    5·2 answers
  • Thermal radiation emitted by objects allows us to feel infrared<br> energy as _____
    7·1 answer
  • Which of these is not a postulate of the kinetic-molecular theory of gases?
    7·1 answer
  • 16. Which of the following is considered to be a vector?
    11·2 answers
  • Thor pushes a car with a mass of 2500 kg. It accelerates 5 m/s2. How much force did Thor apply?
    5·1 answer
  • Which trait is found in bacteria​
    9·1 answer
  • Bo<br> A classroom warms up after<br> the students enter from PE
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!