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Chemistry, 15.06.2021 20:50 janessa0804

What is the mass of an original 15.60-gram sample of cesium-137 that remains unchanged after 90.69 years? *
0.975 grams
1.95 grams
3.90 grams
13.65 grams
O 11.7 grams

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What is the mass of an original 15.60-gram sample of cesium-137 that remains unchanged after 90.69...
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