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Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsFirst Order ReactionsMedium2 minQB

ChemistryMediumsingle choice

The half-life of a radioactive isotope is 1.5 hours. The mass of it that remains undecayed after 6 hours is (if the initial mass of the isotope was 32 g )

Options:

Answer:

Solution:

In six hours, there are $6 \div 1.5 = 4$ half-lives.

Amount remaining

$32 \times (\frac{1}{2})^{4} = 2 g$

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:First Order Reactions

⏱ 2mℹ️ Source: QB

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