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gold bars are plated from an aqueous solution of gold chloride (AuCl3) by using a current of 50 Amperes. With this current, how long would it take to plate out a 1 pound bar of gold worth almost $ 2
A (20.1+/- 0.2)ohm resistor is connected in parallel with a (39.9+/- 0.4)ohm resistor. The resistors are connected to a (2.90+/-0.03)V battery, Calculate the total current in the circuit
Calculate the mass defect and nuclear binding energy per nucleon of the each of the nuclides indicated below. Kr-84 (atomic mass = 83.91151 amu ) mass defect =_____amu binding energy per nucleon____
How many moles of AgCl are produced when 100.0 mL 0.387 M silver nitrate, AgNO3, and 50.0 mL of 0.774 M sodium chloride, NaCl, are mixed AgNO3(aq)+NaCl(aq)---->AgCl(s)+NaNO3(aq)
A certain ideal gas has a molar specific heat at constant volume CV = 7R/5. What is its molar specific heat at constant pressure
What is the molality of a 25.5% aqueous solution of phosphoric acid, H3PO4 (M = 97.99 g/mol)
when the following five solutions are mixed together, only one reaction occurs. write the net ionic equation for that precipitation reaction. KCl(aq),Cu(NO3)(aq),AgNO3(aq),CaCl2(aq),and Ba(No3)2(aq)
Suppose that a particle accelerator is used to move two beams of particles in opposite directions, what is the magnitude of the average current in this region
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and
Joe makes up a aqueous solution of a copper salt from some ore samples he has found in Contact, NV. He places a rod of pure copper into the solution making a cathode and uses a graphite rod as an an
Steam at 100°C is added to ice at 0°C, Find the amount of ice melted and the final temperature when the mass of steam is 14.0 g and the mass of ice is 52.0 g
what are the standard half cell potentials; E anode and E cathode? If the electrochemical cell is allowed to operate as a gavanic cell, which solution species will be oxidized, which solution species
Calculate the amount of solute in g needed to prepare 453.1 mL of a 5.22 %(m/v) LiNO3 solution.
write Lewis structure for Oxygen difluoride, OF2. How many lone pairs are one the oxygen atom
Zinc and sulfur react to form zinc sulfide by the equation shown below. How many grams of ZnS can be formed when 12.0 g of Zn reacts with 6.50 g of S? (Atomic mass: Zn = 65.38, S = 32.06).
What is the maximum concentration of Cd2+ that can exist in a solution in which the S2- concentration is 2.5 x 10-6? Ksp(CdS) = 8.0 x 10-27
When a diver jumps into the ocean, water leaks into the gap region between the diver's skin and her wetsuit, estimate how much energy (in units of candy bars = 300 kcal) is required by this heating pr
Calculate the mass/volume percent [% (m/v)] of 0.278 g of potassium chloride in a 987.8 mL solution.
How many milliliters of 0.50 M HCl solution are needed to titrate 100 mL of 0.20 M NaF to the equivalence point
A 4.40-g lead bullet at 24.0°C is fired at a speed of 220 m/s into a large block of ice at 0°C, in which it becomes embedded. What quantity of ice melts
Hydrocyanic acid (HCN) is a weak acid with Ka = 4.9 x 10-10. The pH of a solution that contains equal numbers of moles of HCN and KCN is closest to
A 66-g ice cube at 0°C is placed in 865 g of water at 26°C. What is the final temperature of the mixture
A solution of 0.0385 M hypochlorous acid, HOCl, has a pH of 4.47. Calculate the acid dissociation constant Ka.
A free floating piston cylinder device that contains 1 kg of a 25% quality saturated mixture of water at 150C, Determine the initial and final pressure, the total energy of electrical work added to th