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A 1.2 kg sample of Th-228 has a half-life of 1.9 years. How many grams of Th is left after 13.3 years?

A 1.2 kg sample of Th-228 has a half-life of 1.9 years. How many grams of Th is left after 13.3 years?
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4 votes
A 1.2 kg sample of Th-228 has a half-life of 1.9 years. How many grams of Th is left after 13.3 years?

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User Lev Kazakov
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8.7k points

1 Answer

2 votes
.009375 kg or 9.375 grams will remain
answered
User Andrei Sinitson
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8.4k points
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