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Chemistry, 18.07.2019 10:10 kitykay2399
The radioisotope cesium-137 has a half-life of 30 years. a sample decayed at the rate of 544 counts per minute in the year 1985. in what year will the decay rate be 17 counts per minute?
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The radioisotope cesium-137 has a half-life of 30 years. a sample decayed at the rate of 544 counts...
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