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Question 1. Explain the phenomenon of radioactive disintegration series relative to 4n, 4n+1, 4n+2 and 4n+3, depicting the 4 disintegration series.
Question 2. An analysis of the rock shows that the relative number of 87Sr and 87Rb atoms is 87Sr/87Rb =0.052. Determine the age of the rock. Given that the half-life period of B- decay of Rb to Sr is 4.7x1010 years.
Question 3. In three ways, show how the time-independent Schrodinger equation can be solved analytically.
The NMR spectrum shows only three singlets: one of area 9 at 0.9 ppm, one of area 2 at 1.0 ppm, as well as one of area 2 at 2.4 ppm. The singlet at 1.0 ppm disappears on shaking with D2O. Find out the structure of the unknown compound.
When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface. Please show all work.
An oxide of copper is decomposed forming copper metal and oxygen gas. A 0.500 g sample of this oxide is decomposed, forming 0.444 g of copper metal. What is the empirical formula of the copper oxide?
The density of liquid oxygen at its boiling point is 1.14 {kg/L} , and its heat of vaporization is 213 {kJ/kg} . How much energy in joules would be absorbed by 2.0 L of liquid oxygen as it vaporized? Express your answer numerically in joules.
How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 35.2 amps in an electrolyte cell
The decomposition of N2O5 is a first-order reaction. At 25 C, it takes 5.2 hours for the concentration to drop from 0.140 M to 7.0×10^-2 M. How many hours does it take for the concentration to drop from 2.8×10^-2 M to 1.4×10^-2 M
The bright bands are 1.07 cm apart, and the third bright bands on either side of the central maximum are missing in the pattern.
How might the yield of product be affected by adding twice as much water as is specified, while keeping the quantities of the other reagents the same
The test tube contained some water (besides the metal) that was subsequently added to the calorimeter. Considering a higher specific heat for water, will the temperature change in the calorimeter be higher, lower, or unaffected by this technique e..
Explain what is the molar concentration of HC2H3O2 in vinegar. Define what is the amount in grams of vinegar that was titrated. Define what was the amount in grams of NaOH
Calculate the YTM. Why do you think the YTM is different for bonds issued by the same company?
Question- 1) What is the magnitude of the energy of a bond formed between a potassium (K+) cation and an iodide (I-) anion? The ionic radii of K+ and I-?, are 152 pm and 206 pm, respectively. Assume the Born exponent n is 10. Please write your ans..
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