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Calculate the pH of the cathode compartment solution if the cell emf at 298K is measured to be 0.660. Calculate the of the cathode compartment solution if the cell emf at 298 is measured to be 0.660
A buffer was prepared by mixing 1.0 mole of ammonia and 1.0 mole of ammonium chloride to form an aqueous solution with a total volume of 1.00 liter. To 200 mL of this solution was added 20.0 mL of 1
An electron enters a uniform magnetic field with magnitude 0.2 T at a 45 angle to . Determine the radius and pitch (distance between loops) of the electron's helical path, assuming its speed is 5 m/
If this planet has the same density as Neptune (1.76 ), what is its radius expressed in kilometers? What is its radius expressed as a multiple of earth's radius?
If the reaction reaches 92.0% of completion (92.0% of the limiting reactant is consumed), what are the partial pressures of each of the reactants in the flask at 275 {rm K}?
At 25oC, the acid dissociation constant for hypochlorous acid HOCl is 3.5E-8. Calculate the concentration of the hydronium ion in an aqueous solution of 0.30M HOCl.
What are the oxidation numbers for 2FeO(s) + NaIO4(aq) + 3H2O(l) -> 2Fe(OH)3(s) + NaIO3(aq)
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?
A 60.0 g sample of an alloy was heated to 96.0 °C and then dropped into a beaker containing 87.0 g of water at 24.1 °C. The temperature of the water rose to a final 27.63 °C. The specif
If 1 Liter of H2 is consumed, what volume of ammonia will be produced at constant temperature and pressure, based on Gay-Lussac's law of combining volumes?
Calculate the enthalpy change that occurs when 1 lb (454 g) of mercury freezes at its freezing point (234.3 K). The standard enthalpy of fusion of mercury is 2.29 kJ · mol-
Determine the energy of 1.90 {rm mol} of photons for each of the following kinds of light. (Assume three significant figures.) ultraviolet 145 nm
The ball's mass is 0.48 kg. What is the magnitude of the net force acting on the soccer ball at this instant?
Please enter the value of AT, the absorbance reading you measured for the mixture at the wavelength of maximum absorbance of thymol blue, 434 nm
A 0.879g sample of a CaCl2.2H2O/K2C2O4.H2O solid salt mixture is dissolved in 150ml of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air
If 2.0 mol of C3H8 and 14.0 mol O2 are placed in a closed container and they react to completion. How many moles of each compound are present?
How many kilojoules of energy are needed to convert 100 g ice at 10.0C to water at 20.0C? (the specific heat of ice at 10C is 2.01)
The coefficient of kinetic friction for a 25 -kg bobsled on a track is 0.10. A) What force is required to push it down a 6.0^circ incline and achieve a speed of 70 km/h at the end of 75 {rm m}?
Calculate percent composition of the mixture containing 140.0 g of chalk, 80.5 g of sugar and 45.3 g of flour.
Determine the theoretical mole ratio of NaCl to NaHCO3.
A 67.0 kg person throws a .0400 kg snowball forward with the ground speed of 30.0 m/s. A second person with the mass of 55 kg catches the snowball. Both people are on skates. The first person is ini
In one student's experiment, the tin can containing 100 mL of water described in the Part 2 Procedure "Energy Content" showed a temperature increase of 9.65°C. Determine the energy content of t
In an experiment carried out at 10 degrees celcius, the initial concentrations were [H2]=[Cl2]=[HCl]=2.25 mol/L. What is the equilibirum concentration of HCl?
A driver is traveling eastward on a dirt road when she spots a pothole ahead. She slows her car from 14.0 m/s to 5.5 m/s in 6.0 s. What is the car's acceleration?
What is the literature Ka value of potassium hydrogen tartrate