Chemistry, 20.02.2022 19:30 spencertodd742
Calcium-49, a radioactive isotope, has a half-life of 9 minutes. If an 80-gram sample of the isotope decays for 27 minutes, how many grams of the original sample remain?
Select one:
a. 60
b. 10
c. 40
d. 20
Answers: 2
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Particles vibrate in a rigid structure and do not move relative to their neighbors.
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The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point
Answers: 1
Calcium-49, a radioactive isotope, has a half-life of 9 minutes. If an 80-gram sample of the isotope...
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