The half-life of 14C is 5730 yr. Find the number of disintegrations emitted by 1.0 mol of 14C in 1 minute. (Note: 1 year = 365.24 day). Express your answer using two significant figures.
The half-life of 14C is 5730 yr. Find the number of disintegrations emitted by 1.0 mol...
The half-life of 238U is 4.5×109 yr. Find the number of disintegrations per hour emitted by 1.0 mol of 238U. (Note: 1 year = 365.24 days).
What is the mass of a 4.10-?Ci 146C source? The half-life of 146C is 5730 yr. Express your answer to three significant figures and include the appropriate units.
What is the mass of a 3.90-?Ci 146C source? The half-life of 146C is 5730 yr. Express your answer to three significant figures and include the appropriate units. please help. I have no idea what im doing on this.
The half-life of 235U, an alpha emitter, is 7.1×108 yr. Part A Calculate the number of alpha particles emitted by 3.4 mg of this nuclide in 3 minutes. Express your answer using two significant figures. TIME GIVEN IS 3 MINUTES
1. The nucleus 14C (half life 5730 y) is used in radiocarbon dating to determine the age of previously living material. (a)A certain sample of wood currently shows a decay rate of 35.0 decays/s of 14C The wood is taken from a structure that was built from a tree that was cut 7,000 years ago. What would have been the 14C decay rate of this wood sample when the tree was cut? (b) Find the total binding energy (in MeV)...
14C decays by emitting a β- particle. This decay process has a half-life of 5.72×103 yr. Answer the following questions about this process and report all answers to three significant figures. A. Determine the initial activity (in dis/yr) of a 5.81 mg sample of this isotope. B. Determine the time (in yr) that it takes for the activity of 14C to decrease to 8.39×107 dis/yr.
If the decay constant for 14C is 1.210×10−4 yr−1, and the natural rate of decay is 13.60 disintegrations/min/g C, what is the age (in years) of an object that exhibits 8.200 disintegrations/min/g C? Remember to use correct significant figures in your answer (round your answer to the nearest whole number). Do not include units in your response.
The half-life for the radioactive decay of C−14 is 5730 years. If a sample of C−14 initially contains 1.7 mmol of C−14, how many millimoles will be left after 2250 years? Express your answer using two significant figures.
The half-life for the radioactive decay of C-14 is 5730 years. You may want to reference (Pages 598 - 605) Section 14.5 while completing this problem. Exercise 14.58 - Enhanced with Feedback 26 of 48 Review I Constants I Periodic Table The half-life for the radioactive decay of C-14 is 5730 years Part A You may want to reference (Pages 598 605) Section 14.5 while completing this problem. How long will it take for 30% of the C-14 atoms in...
The half-life for the radioactive decay of C-14 is 5730 years. You may want to reference (Pages 635 - 641) Section 14.4 while completing this problem. Part A How long will it take for 30% of the C-14 atoms in a sample of C-14 to decay? Express your answer using two significant figures.