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The isotope, Cesium 137, has a half life of 30 years. Cesium-137 is a produced in nuclear power plants. We currently find high levels of Cs-137 in the area surrounding the highly radioactive reactor in Japan. How long will it take for the isotope to decay to about 1/8th of its original amount? Show all work for full credit.
Hydrochloric acid (58.0mL of 0.235M) is added to 212.0mL of 0.0567M Ba(OH)_2 solution. What is the concentration of the excess H^+ or OH^- ions left in this solution
The question is a slab of steel measures 1.01m x 3.72m x 11.1cm. Steel has a density of 7.86g/cm^3. What is the mass of the slab of steel?
antacids which contain CaCO3 react with stomach acid to the equation . it gives the eq but I cant type it. what is the mass of stomach acid that reacts with 1.00 grams CaCO3 ?
Assuming electrons with quantum numbers (n,l,mt,ms), how does an electron with the quantum numbers (2,1,1+1/2) differ from an electron with quantum numbers (2,1,-1,+1/2)?
A second sample of this acid weighing 2.00 grams is added to the titrated sample and the pH is 4.32. Calculate the molar mass of the unknown acid and determine the value of Ka for this acid.
A buffer contains 0.16mol of propionic acid (C2H5COOH) and 0.17mol of sodium propionate(C2H5COONa) in 1.20 L. 1)What is the pH of this buffer?
What is the change in the chemical potential of the liquid. as a function of change in temperature assuming the entropy near the boiling point is constant
Stretched rubber band Touch the relaxed rubber band briefly to your upper lip. Quickly stretch your rubber band and immediately touch the stretched rubber band to your upper lip again
After mixing 2.00g of H2S with 2.00g of NaOH, a 92.0% yield of sodium sulfide is obtained. Calculate the experimental yield in grams obtained in that reaction
Fifty percent of that sunlight is captured by the collector and heats the water flowing through it. What would be the temperature rise of the water as it leaves the collector?
Determine whether or not the mixing of each of the two solutions indicated below will result in a buffer: 75.0 mL of 0.10M HF; 55.0 mL of 0.15 M NaF
A dancehall contains 173 men and 238 women. A certain "promenade" calls for the formation of groups, with each group consisting of one man with two women.
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