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Figure out the sequence of steps and formulate the synthesis of cyclopentanone. The Dieckmann condensation is used in the synthesis of cyclo-pentanone from cyclohexanone.
A rock contains 0.95 mg of U-238 and 0.37 mg of Pb-206.Approximately determines the numbers of U-238 atoms were in the rock when it was produced billions of years ago? Where the half life f
Explain what fraction of the original C-14 would remain today when the half-life of 14C is 5,730 years. Assuming some charcoal from a campfire 29,000 years old was found.
What fraction of a tritium sample will remain after 5.20 years when the heaviest known isotope of hydrogen is called the tritium, 31H. It decays by beta emission, and has a half-life of 12.3
Estimate the major organic product of reaction between the cyclohexanone and the cyclohexanol in the presence of acid (H+)?
Calculate how much energy is released when the polonium-210according to 210^Po------->4^H+206^Pb. {Atomic masses: polonium-210 = 209.982857 amu ; helium-4= 4.002603 amu ; lead-206=205.974449 amu
Determine the numbers of 30mg KMNO4 (Potassium Permanganate) tablets are required to make the following solution? KMNO4 1:50000 600ml.
When 4-methylhexanal is heated in base and undergoes and also addition followed by a dehydration provide the structure of the major organic product that results.
How many moles of KHP are present if you prepare a primary standard by dissolving the 499 mg of dried KHP in 35 ml of distilled water.
Determine the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL. A sample of solid monoprotic acid with molar mass equal to 171.3 g/mol was titrated with 0.1111 M
Determine the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL. A sample of solid monoprotic acid with molar mass equal to171.3 g/mol was titrated with 0
Calculate the mole fractions, volume fractions, and the pressure fractions of each gas when a mixture contains 100g of CO2 and 100g of He. Assuming ideal behavior of the gas mixture, determine th
As the working substance and operates from a most compressed state of 10atm pressure and 600K a Carnot cycle uses 1 mole of ideal gas for which Cv =25JK-1mol-1
How can find out the entropy of fusion? What is its entropy of vaporization if its enthalpy of vaporization at its normal boiling point of 30.6Kis 950Jmol-1.
Evaluate the values of w, ΔU, ΔH, ΔS, and ΔG for the process. Can you use the sign of ΔG to estimate whether the process is spontaneous? Explain.
The precipitate is then filtered from the solution, dried, and weighed. When 20.0mL of a 0.250 (NH4)2S solution is added to a 150.0mL of a solution of Cu (NO3)2,a CuS precipitate forms.
In a titration a 1.0 g sample of plant material containing oxalic acid, H2C2O4, requires 24.0 mL of 0.0100 M KMnO4 to reach the equivalence point. Describe the percentage of oxalic acid in the sa
Determine the change in entropy when 2mol of nitrogen gas expands isothermally and reversibly from volume of 25 liters to a volume of 150 liters?
Methane gas is expanded adiabatically and reversibly from a volume of 1.43L, at a temperature of 25C and a pressure of 3 bars, until the volume is 2.86L. The heat capacity Cp of methane can be
What does this experiment tell us about the molar heat capacity of copper? When a 30g tin slug is taken from a beaker of boiling water at 100Cand dropped into a beaker containing 45g of ice tempera
Provide the structure of the major organic product that results when the 4-methylhexanal is heated in base and undergoes and aldol addition followed by a dehydration.
A 2.0 liter flask contains 2.0 mol of H2S, 0.40 mol of H2, and 0.80 mol of S2 At a particular temperature. Estimate the equilibrium constant for the reaction
The density of cyclohexane is 0.779 g/ml. A 0.2080 g sample of an unknown substance was dissolved in the 20.0 ml of cyclohexane. The freezing point depression was 2.1 degrees C. Determine the molar
Explain what would be the effects of the following stresses on the concentration of NH3 once equilibrium is reestablished? Provide a brief explanation for each.
Why is there such a great difference in their penetrating power if the alpha particles can barely penetrate a piece of paper; beta particles can penetrate a few millimeters of aluminum; gamma ray s