Question

a. How many milligrams of a 72-mg sample of a radioisotope remains unchanged after 4 half-life periods? _mg b. Gold-198 has a half-life of 2.69 days. How much of a 100-gram sample of Gold-198 is left after 8.10 days? __g c. Potassium-42 has a half-life of 12.4 hours. How much of a 750-gram sample of 42K is left after 62 hours?

Name: a how many milligrams of a 72 mg sample of a radioisotope remains unchanged after 4 half life periods mg b gold 198 has a half life of 269 days how much of a 100 gram sample of gold 198 33118
Uploaded: 2022-03-28T10:50:28-08:00
Duration: 1 min 51 s
Channel: Krishna G
Description: a how many milligrams of a 72 mg sample of a radioisotope remains unchanged after 4 half life periods mg b gold 198 has a half life of 269 days how much of a 100 gram sample of gold 198 33118

          a. How many milligrams of a 72-mg sample of a radioisotope remains unchanged after 4 half-life periods?
_____mg
b. Gold-198 has a half-life of 2.69 days. How much of a 100-gram sample of Gold-198 is left after 8.10 days?
______g
c. Potassium-42 has a half-life of 12.4 hours. How much of a 750-gram sample of 42K is left after 62 hours?

Added by Marina S.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Krishna G

03/28/2022

Step 1

Step 1: For part a, we are given that the radioisotope has a half-life of 72 mg and we need to find out how many milligrams remain unchanged after 4 half-life periods. Show more…

Show all steps

Thanks for your feedback!

a. How many milligrams of a 72-mg sample of a radioisotope remains unchanged after 4 half-life periods? _____mg b. Gold-198 has a half-life of 2.69 days. How much of a 100-gram sample of Gold-198 is left after 8.10 days? ______g c. Potassium-42 has a half-life of 12.4 hours. How much of a 750-gram sample of 42K is left after 62 hours?