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A solution is prepared by adding 6.24 g of benzene(C6H6, 78.11g/mol) to 80.74g of cyclohexane (C6H12, 84.16 g/mol). Calculate the mole fraction and molarility of benzene in the solution. ANS: mole f
Which ligand, NH3 or EN, produces the more stable complex cations as indicated by their Kf values? Which metal ion, Cu2+ or Zn2+, forms the more stable complex cation for a given ligand? Explain yo
The mixture is to be& ; separated in a phase column at 333.15 K. By assuming Raoult's law is applied to the system, determine the range of pressures that this system can exists as two phases.
What is the mass, in kilograms, of Avogadro's number of olympic shot put balls if each one has a mass of 16lb? How does this compare with the mass of Earth, 5.98x10^25 kg?
A 51.0-mL volume of AgNO3 solution contains 0.0273 mol AgNO3 (silver nitrate). What is the molarity of the solution?
A 500.0 gram sample of aluminum is initially at 25.0°C. It absorbs 32.60 kJ of heat from its surroundings. What is its final temperature if aluminum has specific heat of 0.9930 J/g°C.
If 2.50 mol of copper and 5.50 mol of silver nitrate are available to react by single displacement, identify the limiting reactant.
Calculate the enthalpy change for converting 10.00g of ice at -25.0°C to water at 70.0°C in kJ. The specific heats of ice, water.
What is the control of the boyle's law in a bottle lab?
If a sample of a compound of carbon and oxygen contains 3.00g of carbon and 8.00g of oxygen, what is the mass percent of carbon in the compound?
When 20 mL of a 315 mL stock solution containing 2.2 M AlCl3 is diluted to 81 mL, what is the concentration of Al3+ in the new solution?
A hard water sample contains 121 mg of CaCO3 per liter of water. Assuming the reaction goes to completion, calculate the mass of Na3PO4 needed to remove all Ca^2+ ions from 2.50 L of the water sampl
What is the total sample size (in grams) for a sample of disulfur octoxide which contains 3.52 g of oxygen?
How many grams of methanol must be added to 7.50kg of water to lower its freezing point to -15.0^circ C? For each mole of solute.
Prepare solution by dissolving .702g of Fe(NH4)2(SO4)2·6H2O in 50mL of water containing 1 mL of concentrated H2SO4. transfer solution completely to a 1L volumetric flask and dilute to exactly
How much energy in kilojoules is required to convert 260 mL of water at its boiling point from liquid to vapor?
A 1.630 -,g sample of naphthalene, C10H8(s)is completely burned in a bomb calorimeter assembly and a temperature increase of 8.46 degrees Celsiusis noted. If the heat of combustion of naphthalene i
How will you prepare the following solutions from 6.0 M solutions of acetic acid and ammonia. Give exact details.
some potassium dichromate, K2CrO7, 2.335 g is dissolved in enough water to make 500. mL of solution. what are the moloar concentraitions of K+ and Cr2O7^2.
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.70mL of a 0.330M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
Which photon has a shortest wavelength when emitted from an atom that transitions from an excited energy to a lower energy?
One mole of A and two moles of B are placed in a container. At equilibrium, the density of the gas mixture is 0.312 g/L at 0.2 atm and 500 K. What is the value of Kc in units of (mol/L)?
Calculate Ecell for the following electrochemical cell at 25 °C Pt(s) | H2(g, 1.00 atm) | H+(aq, 1.00 M) || Pb2+(aq, 0.150 M) | Pb(s) given the following standard reduction potentials.
A solid acid is dissolved in enough water to make 200 ml of a solution. 40 ml of the solution is titrated to a phenolphthalein end point with an NaOH solution. The neutralized solution and the remai