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
Nimfa-mama [501]
3 years ago
15

g Imagine that you found a piece of carved wood that has been embedded in glacial ice. The mass of the wood is 50 grams, and 30%

of the mass is carbon. The 14C/12C ratio of the wood was measured by mass spectrometry, and found to be 20 % of the 14C/12C ratio found in CO2 in modern air. You may assume that the half life of 14C is 5700 years. Which is the best estimate of the age of the wood
Chemistry
1 answer:
astra-53 [7]3 years ago
4 0

Answer:

13414 years

Explanation:

From;

0.693/ t1/2 = 2.303/t log No/N

t1/2 = half life of  C-14

t = age of the sample

No= initial amount of C-14

N = present amount of C-14

From the question, N = 0.2 No

Hence;

0.693/5700 = 2.303/t log No/0.2No

1.2 * 10^-4 = 2.303/t log 1/0.2

1.2 * 10^-4 = 1.6097/t

t = 1.6097/1.2 * 10^-4

t = 13414 years

You might be interested in
All the following process lead to a decrease in salinity of seawater except for A. melting of sea Ice B. Precipitation C. runoff
Elenna [48]
Evaporation is the only
8 0
3 years ago
Use bond energies to calculate δhrxn for the reaction. n2(g)+3cl2(g)→2ncl3(g)
Jobisdone [24]
ΔHrxn = ΣδΗ(bond breaking) - ΣδΗ(bond making)

Bond enthalpies,
N ≡ N ⇒ 945 kJ mol⁻¹
N - Cl ⇒ 192 kJ mol⁻¹
Cl - Cl⇒ 242 kJ mol⁻¹

According to the balanced equation,
ΣδΗ(bond breaking)  = N ≡ N x 1 + Cl - Cl x 3
                                  = 945 + 3(242)
                                  = 1671 kJ mol⁻¹
ΣδΗ(bond making)    = N - Cl x 3 x 2
                                 = 192 x 6
                                 = 1152 kJ mol⁻¹

δHrxn = ΣδΗ(bond breaking) - ΣδΗ(bond making)
          = 1671 kJ mol⁻¹ - 1152 kJ mol⁻¹
          = 519 kJ mol⁻¹
3 0
4 years ago
Read 2 more answers
Changing the position of the increases or decreases your effort
MA_775_DIABLO [31]
Changing what position?
3 0
3 years ago
The state of matter in which a material has a definite shape and a definite volume is the _____ state.
Scilla [17]

Answer:

solid

Explanation:

in the solid state the material will has a fixed shape and volume whatever the container that contains it

where in liquid the shape will be different depending on the container

and in gas state the shape and volume are not definite

3 0
2 years ago
Why is sucrose insoluble in dichloromethane?
Vika [28.1K]
Sucrose is insoluble in dichloromethane because dichloromethane is not a polar solvent.
Sucrose is soluble in water because the molecules of sucrose has the ability to react with the molecules of water and thereby forming hydrogen bond which enhance the dispersion of sucrose in the water. 
Sugar can not react in a similar way with dichloromethane because they do not possess chemical species that can react together to form bonds. Thus, sugar is a polar substance which can not dissolve in a non-polar solvent.
5 0
3 years ago
Other questions:
  • Bgbdasldfibjodfbnadfbgnaodfbandobnadbnoabnadnbjonabdnadbnadfbndanfbnadbnabnadnbadnnbabnadbnasd'
    7·1 answer
  • Which of the following is NOT an example of a physical change? *
    5·1 answer
  • 3Al + 3NH4ClO4 → Al2O3 + AlCl3 + 3NO + 6H2O<br> How many moles of AlCl3 are produced?
    9·3 answers
  • A reproducible measurement is an accurate one. A. True B. False
    11·2 answers
  • What is the chemical formula of diphosphorus monoxide?
    10·1 answer
  • Nepal is rich in species diversity why?? Explain with any three reason. Help this beginer out !!!​
    6·1 answer
  • Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of CH3Cl. a. The electron-pair geometry is lin
    15·1 answer
  • An orbital is best defined as
    15·1 answer
  • For the reaction: CaO + SO3 → CaSO4, how many moles of CaSO4 are produced
    14·1 answer
  • Identify the balanced chemical equation that represents a decomposition reaction.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!