Question 1183275
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Over the space of 8 years, the amount remaining decreases by a factor of 450/800 = 9/16.<br>
After another 8 years, the amount will again decrease by the same factor.<br>
ANSWER: (9/16)*450 = 253 1/8<br>
Since radioactive decay is a statistical process, it should be okay to round the answer to 253g.<br>