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
PLEASEE HELPPP ME WITH NUMBER 5!!!!!!!
riadik2000 [5.3K]

Answer:

hi dont report me we are friends can i get brainliest plzz?

Explanation:

5 0
3 years ago
16. A sample of nitrogen gas,
Lana71 [14]

find mol of N2 present using gas law equation

PV = nRT

P = pressure = 688/760 = 0.905 atm.

V = 100mL = 0.1L

n = ???

R = 0.082057

T = 565+273 = 838

Substitute:

0.905*0.1 = n*0.082057*838

n = 0.0905 / 68.76

n = 0.00132 mol N2

Molar mass N2 = 28 g/mol

0.00132 mol = 0.00132*28 = 0.037g N2 gas

4 0
3 years ago
What is the name of the organization where Chris brown works?
Nitella [24]

Answer: Chris Brown has launched a charity organization called the Symphonic Love Foundation.

Explanation:

8 0
1 year ago
Strontium sulfate becomes less soluble in an aqueous solution when sodium sulfator is added because
horsena [70]

Answer:

The addition of sulfate ions shifts equilibrium to the left.

Explanation:

Hello!

In this case, according to the following ionization of strontium sulfate:

SrSO_3(s)\rightleftharpoons Sr^{2+}+SO_4^{2-}

It is evidenced that when sodium sulfate is added, sulfate, SO_4^{2+} is actually added in to the solution, which causes the equilibrium to shift leftwards according to the Le Ch athelier's principle. Thus, the answer in this case would be:

The addition of sulfate ions shifts equilibrium to the left.

Best regards!

7 0
2 years ago
Read 2 more answers
Which occurs whenever valence electrons are shared or transferred between atoms?
Tanzania [10]

Whenever electrons are shared or transferred between atoms there is a chemical reaction.

The electrons that are being transferred between atoms (two or more) create new bonds, which enable the production of a new substance. This process is then known as a chemical reaction.

4 0
3 years ago
Other questions:
  • When doing a recrystallization what observations would prompt
    11·1 answer
  • How many base units exist?
    5·1 answer
  • Which of the following may suggest a catalyst has been used in a reaction, given the energy diagram for the same reaction withou
    11·1 answer
  • If the above two waveforms were sound waves, we would hear the ___________ wave louder. If the above two waveforms were light wa
    15·2 answers
  • What land feature creates new land? <br> Glacier <br> Basin<br> Volcano <br> Desert
    11·1 answer
  • What is the name of this hydrocarbon?
    6·1 answer
  • Can you think of 2 renewable resources and 2 nonrenewable resources
    6·2 answers
  • Terry usually rides his bike 15mph. If his riding speed is reduced by 3mph how far can he ride in 1.7 hours
    11·1 answer
  • What did you observe happening in the cups?
    9·2 answers
  • The only type of movement particles in a solid do is
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!