Multiple Choice
After two half-lives, what fraction of a radioactive sample remains undecayed?
15. Chemical Kinetics
Half-Life
Back15. Chemical Kinetics
Half-Life
- Multiple ChoiceAfter a radioactive sample undergoes two half-lives, what fraction of the original sample remains?
- Multiple ChoiceIf a radioactive sample is in its second half-life, what percentage of the original sample remains undecayed (stable) at this point?
- Open Question
What is the half-life for a particular reaction if the rate law is rate = (1301 min-1)[A]?
1views - Multiple ChoiceAfter four half-lives, what fraction of a sample's original radioactive atoms remains?
- Multiple ChoiceFor the hypothetical second-order reaction: A → products, the general rate law is: rate = k[A]². How long is the third half-life of the reaction if [A]₀ is 0.080 M and the first half-life is 22 minutes?1views
- Multiple ChoiceGiven the rate law rate = 1301 min^{-1} [A] for a particular reaction, what is the half-life (t_{1/2}) for this reaction?
- Open Question
How long will it take for the concentration of SO2Cl2 to decrease to 25% of its initial concentration?"
1views - Multiple ChoiceThe graph below shows the decay of a radioactive isotope. What is the half-life of the isotope?
- Multiple ChoiceIf you start with 80 grams of cobalt-60, how many grams will remain after three half-lives?
- Multiple ChoiceWhich of the following statements about the half-life of a radioactive isotope is true?
- Multiple ChoiceWhich of the following best describes what occurs during one half-life of a radioactive substance?
- Multiple ChoiceWhat is the half-life of a second-order reaction in which 45.0% of the original concentration of 1.00 M remains after 325 seconds?1views
- Multiple ChoiceIn the reaction 3 BrO-(aq) → BrO3-(aq) + 2 Br-(aq), a plot of 1/[BrO-] vs. time is linear with a slope of 0. What does this indicate about the order of the reaction with respect to BrO-?1views
- Multiple Choice
Use the data below to determine the half-life of decomposition of NOCl reaction which follows 2nd order kinetics.
1views