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An isotope of cesium (cesium-137) has a half life of 30 years. If 1.0 g of cesium-137 disintegrates over a period of 90 years, how many grams of cesium-137 would remain?

Please include a solution, thanks!!

Sagot :

Shimishibago Shimishibago

Answer:

0.125 mg 3 half-lives

Explanation:

1mg---> 0.5mg --> 0.25mg

----> 0.125mg

90 years / 30 years =3 half lives

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