1) A 141 g sample of carbon from ancient wood is found to have an activity...
1) A 141 g sample of carbon from ancient wood is found to have an activity of 5.289 decays/min. a. How many half lives have elapsed since the tree was cut down? b. How many years have elapsed since the tree was cut down?
would appreciate any help
Homework Answers
apply activity = dN/dt = LN
L = 5.289/60/141
L = 6.251*10^-4
as decay consatnt L = Ln2/T1/2
T/12 = 0.693/6.251 e-4
T/12 = 1108.48 years--------------answer to part B
------------------------------------------
apply N = N0 e^-Lt
e^-Lt = 1/141) = 0.00709
-Lt = 4.94
t = 4.94/6.251 e-4 = 7916 .67 Years------answers A
decay constant (?): 5.289
half-life (t1/2): 0.13105448678389
mean lifetime (?): 0.18907165815844
Add Answer to:
1) A 141 g sample of carbon from ancient wood is found to have
an activity...
An ancient club is found that contains 140 g of pure carbon and has an activity...
An ancient club is found that contains 140 g of pure carbon and has an activity of 5.5 decays per second. Determine its age assuming that in living trees the ratio of (14c 12c) atoms is about . Note that the half life of carbon-14 is 5700 years and the Avogadro number is 6.02x10^23. in years
An ancient club is found that contains 190 g of pure carbon and has an activity...
An ancient club is found that contains 190 g of pure carbon and has an activity of 6.5 decays per second. Determine its age assuming that in living trees the ratio of (14C / 12C) atoms is about 1.20×10-12. Note that the half life of carbon-14 is 5700 years and the Avogadro number is 6.02×1023. Answer in years.
A wooden object from the site of an ancient temple has a carbon-14 activity of 10...
A wooden object from the site of an ancient temple has a carbon-14 activity of 10 counts/min compared with a reference piece of wood cut today that has an activity of 40 counts/min. If the half-life for carbon-14 is 5730 y, what is the age of the ancient wood object? Please Express your answer to two significant figures and include the appropriate units.
A mummified cat is found in an ancient Egyptian tomb. The activity per gram of carbon...
A mummified cat is found in an ancient Egyptian tomb. The activity per gram of carbon is found to be 10 decay/(min g). The mass of carbon-12 is 12 u (by definition), where u = 1.66 X 10-27 kg. If the half-life of Carbon-14 is 5730 years, then how old is the cat?
1. An ancient club is found that contains 200 g of pure carbon and has an...
1. An ancient club is found that contains 200 g
of pure carbon and has an activity of 7.5 decays per second.
Determine its age assuming that in living trees the ratio of
(14C12C)(14C12C) atoms is about 1.30×10−121.30×10−12. Note that the
half life of carbon-14 is 5700 years and the Avogadro number is
6.02×10236.02×1023.
An ancient wooden club is found that contains 65 g of carbon and has an activity...
An ancient wooden club is found that contains 65 g of carbon and has an activity of 8.1 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10^-12. Answer In years
An ancient wooden club is found that contains 79 g of carbon and has an activity...
An ancient wooden club is found that contains 79 g of carbon and has an activity of 7.0 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12.
An ancient wooden club is found that contains 66 g of carbon and has an activity...
An ancient wooden club is found that contains 66 g of carbon and has an activity of 7.5 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12. Please show your work.
there was no image provided 3. An ancient club is found that contains 150 g of...
there was no image provided
3. An ancient club is found that contains 150 g of pure carbon and has an activity of 5.5 decays per second. atoms is about 1.20 ×10¬12. Note that the 14C assuming that in living trees the ratio of (E) Determine its age half life of carbon-14 is 5700 years and the Avogadro number is 6.02 x1023. years
An ancient club is found that contains 180 g of pure carbon and has an activity of 5.5 decays per second. Determine its age assuming that in living trees the ratio of (14C12C)(14C12C) atoms is about 1...
An ancient club is found that contains 180 g of pure carbon and has an activity of 5.5 decays per second. Determine its age assuming that in living trees the ratio of (14C12C)(14C12C) atoms is about 1.40×10−121.40×10−12. Note that the half life of carbon-14 is 5700 years and the Avogadro number is 6.02×10236.02×1023.
1. An ancient club is found that contains 200 g
of pure carbon and has an activity of 7.5 decays per second.
Determine its age assuming that in living trees the ratio of
(14C12C)(14C12C) atoms is about 1.30×10−121.30×10−12. Note that the
half life of carbon-14 is 5700 years and the Avogadro number is
6.02×10236.02×1023.
there was no image provided
3. An ancient club is found that contains 150 g of pure carbon and has an activity of 5.5 decays per second. atoms is about 1.20 ×10¬12. Note that the 14C assuming that in living trees the ratio of (E) Determine its age half life of carbon-14 is 5700 years and the Avogadro number is 6.02 x1023. years
Most questions answered within 3 hours.
-
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 1 hour ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 2 hours ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 3 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 3 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 4 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 5 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 6 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 7 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 7 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 8 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 10 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 10 hours ago