The radioactive cobalt isotope, "Co, has an half-life of 63 months and undergoes decay. The m of Co is 59.9338222 amu. A sample initially contains 48 mg of 6°C.. (a) Calculate the number of moles of "Co that are left in the sample after 5.0 years. (b) Calculate the activity of Co after 5.0 years, in units of per month (month).

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Q: approximately 25,000 years. How many undecayed nuclei remain after 100,000 years? b) calculate the…

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Q: what is it's half-life?

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Q: Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. (a) How many beta particles are…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.