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Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
Calculate pH and pOH of .050 m solutions of H2CO3 and Al(h20)63+
Show the movements of the electron pair that occur to form the product. Which reactant is the lewis acid? Which is the Lewis base? how do you know?
Water flows over Victoria Falls, which is 128 m high, at a rate of 1.4 x 106 kg/s. If half the potential energy of this water were converted into electric energy, how much electric power would be p
A 84.0mL volume of 0.25 M HBr is titrated with 0.50 M KOH. Calculate the pH after addition of 42.0mL of KOH.
A 47.6-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk ma
Write the half-reactions for the following redox reaction 2Li + H2 -> 2LiH
75.00 mL of an aqueous solution of formic acid is titrated with a 0.150 M aqueous solution of NaOH. It is found that 21.25 mL of the NaOH solution is needed to reach the equivalence point. Formic ac
A 2.10 M aqueous soluion of pyridine C6H5N has a pH 0f 9.78. Why are the concentration of these solutions diffferent even though their pH values are the same?
A rifle with a barrel length of 60 fires a 10 bullet with a horizontal speed of 450 . The bullet strikes a block of wood and penetrates to a depth of 10 .
What is the percent by mass of sodium phosphate in a 0.142M Na3PO4(aq) solution that has a density of 1.015g/mol.
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
What work would you have to do to now move the negative charge back to infinity?
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
An object is being acted upon by three forces and moves with a constant velocity. One force is 60.0 N along the x-axis, the second is 75.0 N along a direction making a counterclockwise angle of 150.
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 cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. The same cart again traveling at 0.3 m/s collides with a different stat
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?