How many disintegrations per second are there in one gram
Radioactive decay is 1st order and decay rates are given as half life. Give that potassium contains 0.0118% K^40, which has a half life of 1.27 x 10 ^9 years, how many disintegrations per second are there in 1 gram of KCl?
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CI.20 K+ is an electrolyte required by the human body and is found in many foods, as well as salt substitutes. One of the isotopes of potassium is 40K, which has a natural abundance of 0.012% and a half-life of 1.30x10 to the 9th power years.
Assume that water at 100 degrees celsius is saturated with KNO3 and then allowed to cool to 15 degrees celsius. Calculate the percentage of KNO3 that will crystallize out.
A 35.0 mL sample of an aqueous H2O2 solution was titrated with 23.5 mL of a 0.0204 M aqueous KMnO4 solution according to the balanced equation. Calculate the molarity of the H2O2 solution.
A single point charge of +q is placed at the very center of two spherical shells. The inner shell is non-conducting, has a charge of -2q, and an inner radius of a and outer radius of b.
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