How long will it take for 18 %% of the U−238U−238 atoms in a sample of U−238U−238 to decay?
Express your answer using two significant figures.
How long will it take for 18 %% of the U−238U−238 atoms in a sample of...
If a sample of U−238 initially contained 1.1×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today? How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Express your answer using two significant figures Constants| Periodic Table The half-life for the radioactive decay of U - 238 is 4.5 billion years and is independent of initial concentration. t- 6.8x108 yr All attempts used;...
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. a) How long will it take for 17 % of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures and in yrs b) If a sample of U−238 initially contained 1.8×1018 atoms and was formed 4.9 billion years ago, how many U−238 atoms does it contain today? Express your answer using two significant figures.
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 14 % of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures. Part B If a sample of U−238 initially contained 1.4×1018 atoms and was formed 5.7 billion years ago, how many U−238 atoms does it contain today? Express your answer using two significant figures.
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures. Part B If a sample of U−238 initially contained 1.5×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today? Express your answer using two significant figures.
If a sample of U−238U−238 initially contained 1.8×1018 atoms and was formed 5.6 billion years ago, how many U−238U−238 atoms does it contain today?
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. If a sample of U−238 initially contained 1.2×1018 atoms and was formed 6.3 billion years ago, how many U−238 atoms does it contain today? Express your answer using two significant figures.
Halflife = 4.5 billion years Part B If a sample of U-238 initially contained 1.9x1018 atoms and was formed 3.8 billion years ago, how many U-238 atoms does it contain today? Express your answer using two significant figures. V AXO O ? atoms Submit Request Answer < Return to Assignment Provide Feedback
The half-life for the radioactive decay of U−238 is 4.5 billion years and is independent of initial concentration. 1.How long will it take for 10% of the U−238 atoms in a sample of U−238 to decay? 2.If a sample of U−238 initially contained 1.9×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today?
Part A How many nuclei of 238 U remain in a rock if the activity registers 650 decays per second? The half-life is 4.468x10 yr. Express your answer using two significant figures. IVO AO . o mi? N nuclei Submit Previous Answers Request Answer
A sample of N2O effuses from a container in 46 seconds. How long would it take the same amount of gaseous I2 to effuse from the same container under identical conditions? Express your answer using two significant figures.