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Illustrate an energy level diagram for a particle on a ring. The particle on a ring problem roughly corresponds to the delocalized electrons on a benzene molecule.
Chloroform (CHCl3) and Carbon tetrachloride (CCl4) form a nearly ideal solution. At 25degrees C, the vapor pressure of our CHCl3 is 199.1mmHg and the vapor pressure of pure CCl4 is 114.5 mmH
Suppose you fill a balloon with helium gas to a volume of 2.68 L at 23*C and 789 mmHg. Then you release the balloon. Explain what would be the volume of helium if its pressure changed to 556 mmHg b
2.367*10 to 25 power molecules of C2H6 Calculate how many moles of atoms are present in the 6.853*10 to 23 power formula units of Ca3 (PO4)2?
A manometer consists of U-shaped tube which is having a liquid. One side is connected to the apparatus and the other is open to the atmosphere.
The densities of air at 100 (degrees) C are 1.877g dm-3 and -85(degrees) C, 0(degrees) C, 0.946 gdm-3 and 1.294 g dm-3, respectively. From these data, and assuming that air obeys Charles's law, find
Ag2+, Cu2+, Ba2+, and Mn2+. Addition of HCl causes a precipitate to form. After the precipitate is filtered off, H2SO4 is added to the supernatant and another precipitate forms.
Determine the numbers of photons will be needed to raise the temperature of 2.5 g of water by 2.2 k? Water is exposed to infrared radiation of wavelength 3.0×10-4 cm.
What is the molarity of the unknown phosphoric acid solution? A 20.00 mL sample of phosphoric acid was neutralized with33.44 mL of 0.109 M NaOH.
Calculate how many grams of nickel must be added to 500 grams of copper to form an alloy that has a liquidus temperature of 1350C? Calculate the ratio of the number of nickel atoms to copper atoms i
What is the rate of diffusion of helium gas at the same temperature if nitrogen gas has an average rate of diffusion of 0.126cm/s at the room temperature?
Determine the number of molecules in a deep breath of air whose volume is 2.59 L at the body temperature, 37°C, and which is having the pressure of 743torr.
Determine the change in molar entropy of aluminum that is heated from the 600 to 700°C. The heat of fusion is 393J/g, the melting point of Al is 660°C and the heat capacities of the
What is the volume of nitrogen at STP when the Pantothenic acid is a B vitamin. Using the Dumas method, you find that a sample weighing 55.4 mg gives 3.84 mL of nitroen gas at27*C and 745 mmHg.
Methanol, CH3OH, can be formed in industrial plants by reacting the carbon dioxide with hydrogen in the presence of a catalyst. Water is the other product.
How can estimate the density of hydrogen sulfide gas, H2S, at the 56*C and 967 mmHg. Obtain the density in grams per liter.
The aluminum sample is quickly transferred to 50.0 mL of water at23.8oC contained in a calorimeter. An 18.50-g sample of aluminum is heated t 0 99.9o C in a hot water bath until thermal equilibri
Write down the structure for this Diels-Alder addition product when Cyclopentadienone is unstable and rapidly undergoes the Diels-Alder reaction with itself.
Draw the steps involved in the basifying and extracting caffeine from the 20 mL of tea using 2 x6.0 mL dichloromethane extractions.
What is the molecular weight of the substance? Suppose you vaporize a liquid substance at the 100*C and 755 mmHg where the volume of 0.627 g of vapor is 261 mL.
Estimate the volume of hydrogen produced at the 28*C and 693 mmHg from the 0.0921 mol Mg and excess HCl.
The U.S. Navy developed an undersea habitat in a series of experiments. The mole percent composition of the atmosphere in the undersea habitat was 79.0% He, 17.0%N2, and 4.0% O2 in one experiment.
What is the atomic weight of metal M if a sample of metal oxide (0.4150g) with the formula M2O3 is quantitatively converted to metal sulfide, MS, yielding 0.4570g?
If the activation energy for vacancy formation is 20,000 cal/mol than calculate the number of vacancies per cm3 expected in copper at1080 C. Explain in details.
A solution (A) which is having an analytic (sucrose) was provided in a 250.0 mL volumetric flask. A 10.00 mL aliquot of this solution was diluted to the 25.00 mL in a volumetric flask.