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One of the nuclides in spent nuclear fuel is U-253, an alpha emitter with a half life of 703 million years. How long will it take for the amount U-235 to reach 14.0 percent of its initial amount? T=?
three students chemist measured 50.0 ml of 1.00 m naoh in seperate styrofoam coffee cups calorimeters part b. brett
What mass of water would be needed to evaporate from your skin in order to dissipate 1.7 X 105 J of heat from your body?
a. finance is a very challenging and rewarding field. it is exciting area because financial managers are given the
What are the units of the rate constant? c) What is the average value of the rate constant calculated from the three data sets?
Cesium-137 has a half-life of 30 years. You begin with a 20.0 g sample of Cs-137. How many half-lives occur if you wait a total of 60 years?
Dry the hydrate as instructed in the lab procedure, noting down it's mass until it appears to no longer decrease (no more water bound in the sample).
Both solutions were initially at 35.00°C and the temperature of the resulting solution was recorded as 37.00°C, determine the ??H°rxn (in units of kJ/mol NaOH) for the neutralization reaction between aqueous NaOH and HCl.
Consider a certain type of nucleus that has a rate constant of 2.92 s 10^-2min^-1. Calculate the time rquired for the sample to decay to one-fourth of its initial value.
What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass? 0.150
Important information about Proteins, A globular protein in aqueous surroundings contains the following amino acid residues; phenylamine, methionine, glutamate, lysine, and alanine.
For the series of spectral lines of atomic hydrogen with n1 = 3, which of the following wavelengths does not correspond to a wavelength predicted by the Rydberg equation? Rydberg equation: 1/? = (1.097 x 107 m-1) x (1/n12 - 1/n22) ----- A. 1875 nm..
Draw complete Lewis structure for following condensed structural formula. (CH3CH2)CO
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