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Physics, 11.12.2019 06:31 lizz1228

Actinium-226 has a half-life of 29 hours. if 10g of actinium-226 disintegrates over a period of 145 hours,
how many mg of actinium-226 will remain?
a. 0.3125mg
c. 31.25mg
b. 3.125mg
d. 312.5mg

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