The half- life of bromine-74 is 25 min. how much of a 6.8mg sample is still...

The half- life of bromine-74 is 25 min. how much of a 6.8mg sample is still active after 75 min?

Expert Solution

Initially if we have 6.8 mg of bromine then after 25 min it will be = 6.8/2

= 3.4 mg

therefore after next 25 min or after total 50 min it will be = 3.4/2

= 1.7 mg

finally after next 25 min or after complete 75 min it will be = 1.7/2

= 0.85 mg

queen_honey_blossom answered 2 years ago

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