Ahalf-life is the time it takes an amount of substance to decay to one-half of its original amount. for example, the sample is one-half after the first half-life but one-quarter (i. e., one-half of one-half) after the second half-life. if the half life of uranium-235 is 700 million years, how long does it take for 10.0 grams to decay to 2.5 grams? express your answer in billions of years.
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Ahalf-life is the time it takes an amount of substance to decay to one-half of its original amount....
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