Multiple Choice
The half-life of 32 grams of a radioactive substance is 6.5 hours. How many grams of the substance remain after 19.5 hours?
A) 16 grams
B) 8 grams
C) 4 grams
D) 2 grams
E) 32 grams
Correct Answer:

Verified
Correct Answer:
Verified
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