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Strontium 90, radioactive isotope, is a main product of an atomic bomb explosion. It has a half-life of 28.1 yr. (a) Compute the first-order rate constant for the nuclear decay.
Compute the volume of the tank if this tank has 115 moles of neon gas and has a pressure of 57 atm at a temperature of 45 0C.
the chemical reaction for a zinc-oxygen cell iszn c 12o2g h2o l znoh2 cand the thermodynamic properties at 25 oc
How much of the drug substance has to be used (calculate)? B) How much NaCl do you need to add to hace an isotonic preparation?
Using vsepr molcule determine Electron Domain and Molcules for. CH3I ClF3 H2S SO3 SO4^-2 Nh4 NH2^- CO3^-2 ICI2
analysis. To a 500 mL air sample at 700 torr and 38 deg C, she adds 20.00mL of 0.01017 M aqueous iodine which reacts as follows:
What is the concentration of the solution which results when 50.0 mL of 1.0 M CuCl2 solution is mixed with 100 mL of 4.0 M CuCl2 solution
Calculate the binding energy E B of the helium nucleus 4 /2 He .Express your answer in millions of electron volts to four significant figures.
At a certain temperature, Kp = 1.42 for the reaction PCl5 PCl3 + Cl2. Calculate the equilibrium partial pressures and the total pressure if the initial partial pressures are PpCl5= 2.88 atm , PpCl3 = 1.98 atm , and PCl2 = 1.42 atm.
The half life for the radioactive decay of C-14 is 5730 years and is independent of the initial concentration. How long does it take for 25% of the c-14 atoms in a sample of C-14 to decay?
what is the molar mas of gas if 1.20g of the gas has a volume of 235 mL at STP? A 1.26 sample of He gas has a pressure of .123 atm and volume of 32.6 L. what is the temperature in degrees C?
If you have 100 ml of pure water and add to it 10 ml of 2.0M HNO3, what will be the pH of the final solution
Estimate the mass of water that must evaporate from the skin to cool the body by 0.50. Assume a body mass of 85 and assume that the specific heat capacity of the body is 4.0.
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