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Problem- The half-lives of different radioisotopes are given here: Argon-44, 1/2 Life 12min; Lead-196, 1/2 Life 37 min; Potassium-44, 1/2 Life 22 min; Indium-117, 1/2 Life 43 min. If the initial amount of Argon-44 is 6.4 g, How much Argon-44 is left in the body after 24 min?
I am not able to determine the correct answer for the above question please helps me to get the correct answer
At 0.0oC, if the volume of air is 3.1 mL and the pressure of the atmosphere that day is 815 mmHg, what is the number of moles of air?
Calculate the concentrations of H+, H4IO6-, and H3IO62- in a 0.200 M H5IO6 solution. Use the following equations
Draw the Lewis structure of the molecule, assuming that the Cl atoms bond to a single C atom and that there is a C-C bond and two C-O bonds in the compound.
A compound, C7H12O4, has an IR spectrum showing a peak at 1735 cm-1. Its 1H NMR spectrum has peaks at delta 1.3 (6 H, triplet), 3.4 (2 H, singlet), and 4.2 (4 H, quartet). Draw its structure
calculate the mass in grams of solid benzoic acidc6h5cooh you would need in order toprepare 1.0 liter of benzoic
Use Huckel molecular orbital theory to answer the following questions. Express energies as functions of the parameters α and β. Write down the secular determinant and calculate the π molecular orbital energy levels of ethene.
an aerosol can holds 0.35 L at 4.5 atm pressure. What is the volume when the gas is released into 1.0 atm pressure.
In order to neutralize a 2M HCL solution you could use a 2M NaOH solution. What will be the difference(if any) if you would use a 6M NaOH solution instead
a sample of iron absorbs 67.5 j of heat upon which the temperature increases from 21.5 c to 28.5 c. if the specific
The following reaction was carried out in a 2.50L reaction vessel at 1100 K: C(s)+H2O(g)?CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 5.25mol of C
Problem- Silver and rubidium both form +1 ions, but silver is far less reactive. Suggest an explanation, taking into account the ground-state electron configurations of these elements and atomic radii.
Purification of nickel can be acheived by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an electrolytic cell.
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