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The half-life of lead-212 is 11h. How much of a 100-g sample of lead-212 is left after 33h? Someone please help
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The half-life of lead-212 is 11h. How much of a 100-g sample of lead-212 is left after 33h?

Someone please help

User Seanbrant
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After 33 hours, the sample would have undergone a halving 3 times, as its half life is 11 hours.

This would mean that after 33h, only 12.5grams of Lead-212 are left over.
User Oddtwelve
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