J.R. S. answered 05/18/20
Ph.D. University Professor with 10+ years Tutoring Experience
After 1 half life - 0.5 left
After 2 half lives - 0.25 left
After 3 half lives - 0.125 left
20.0 mg x 0.125 = 2.50 mg left
Mallory P.
asked 05/18/20Your original sample of Manganese -56 is 20.0 mg. How much is left after 3 half lives. Round to the correct number of significant figures and use units (mg)
J.R. S. answered 05/18/20
Ph.D. University Professor with 10+ years Tutoring Experience
After 1 half life - 0.5 left
After 2 half lives - 0.25 left
After 3 half lives - 0.125 left
20.0 mg x 0.125 = 2.50 mg left
Get a free answer to a quick problem.
Most questions answered within 4 hours.
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.