How long does it take until 5% of the isotope technetium-99m d) nains? Round to the nearest tenth of the hour.

Q: The half-life of palladium-100 is four days. (So half of any given quantity will disintegrate in…

A: Let the initial mass of palladium-100 is m, it is given that mass will reduced to half in 4 days. so…

Q: The half life of a radioactive sample is 50 days. How much of a 800 mg sample remain after 1 year?…

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Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

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Q: A compounded syrup contain10% (w/v) of drug X. Calculate the amount of drug X (in mg) that is…

A: The problem is asking us to find the amount of drug X in a 10 mL dose of a syrup that contains 10%…

Q: The half-life of radium in a piece of lead is 1600 years. What percentage of the original amount of…

A: Given that, the half-life of radium in a piece of lead is 1600 years. Note that, the formula for…

Q: If  14g of a radioactive substance are present initially and  5yr later only  7.0g​ remain, how much…

A: We know rate of radioactive decay is proportional to the amount of substance present i.e. dNdt∝N

Q: A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is present in living…

A: the radioactive decay equation is  given by m=m0e-ln2t't where t' is the half life. the tomb…