Questions tagged 'bromine-74'
1 questions
The half-life of bromine-74 is 25 min. How much of a 4.0mg sample is still active after 75 min?
What is the remaining mass of a 4.0 mg sample of bromine-74 after 75 minutes, given that its half-life is 25 minutes? a) 0.50 mg b) 1.0 mg c) 2.0 mg d) 0.25 mg e) 4.0 mg