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The element indium (In) is to be obtained by electrolysis of a molten halide of hte element. Passage of a current of 3.20 A for a period of 40 min results in formation of 4.57g of indium.
A current of 15 A flows through an electric heater operating on 120 V. What is the heater's resistance? Compute the power consumption of the electric heater in kW? How much energy does it use in 600
What is the frequency in Hz of the photon released when a hydrogen atom undergoes a transition from the excited state where n = 6 to the state where n = 3?
The Madelung constant for the KCl structure is 1.748 and the closest distance etween ions of opposite sign is 0.314 nm. On the basis of these data,what is the cohesive energy of KCl. Compare this wi
Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 110 km/h and is now shifted into neutral and is allowed to coast. (Take the densi
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 680 km above the surface of the Moon, where the acceleration
Determine the tangential acceleration of the car when it is halfway through the turn (i.e. 1/4 of a circle), assuming constant tangential acceleration. Determine the radial acceleration of the car a
A hollow sphere of radius 0.15 m, with rotational inertia I = 0.082 kg m^2 about a line through its center of mass, rolls without slipping up a surface inclined at 30° to the horizontal. At a ce
Calculate the molarity of a sodium hydroxide if 39.73 mL ofthe solution is needed to neutralize 122 mL of 0.483 Moxalic acid. The equation for the reaction is?
(a) What is the speed of the three coupled cars after the collision? (b) How much kinetic energy is lost in the collision?
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 50.0 m/s and returns the shot with the ball traveling horizontally at 40.0 m/s in the opposite direction. (a) What
What is the half-life in minutes of a radioactive nuclide if 1/32 nd of the original sample remains after 84.0 min?
When the block leaves the wedge , its velocity is measured to be 4.00 m/s to the right. (a) What is the velocity of the wedge after the block reaches the horizontal surface? (b) What is the height o
When you stand on your head, what is the difference in pressure of the blood in your brain compared with the pressure when you stand on your feet if you are 1.85 m tall? The density of blood is 1060
If the curve were flat, what would the minimum coefficient of static friction between the tires and the roadbed have to be in order to provide the total acceleration with no slipping or skidding whe
The rock in a lead ore deposit contains 84% pbs by mass. How many kg of the rock must be processed to obtain 1.0 kg of pb?
The average intensity of sunlight at the top of the earth's atmosphere in 1390 W/m2. What is the maximum energy that a 24-m x 45-m solar panel could collect in 1.3 hours in this sunlight?
Metallic copper is formed when aluminum reacts with copper(II) sulfate. How many grams of metallic copper can be obtained when 54.0 g of Al react with 319 g of CuSO4?
In an action movie, the hero grabs a rope attached to the rafters of a warehouse to swing across to the other side. If his arms are capable of exerting a force of 2000 N on the rope, what is the max
Find the location of the final image by ray tracing (make a scale diagram) and then verify this location by using the lens equation.
Calculate the molarity of a sodium hydroxide if 48.72 mL ofthe solution is needed to neutralize 192 mL of 0.378 Moxalic acid. The equation for the reaction is?
Two identical diverging lenses are separated by 15 cm. The focal length of each lens is -8.0 cm. An object is located 4.0 cm to the left of the lens that is on the left. Determine the final image di
Calculate the volume of 2.44M sulfuric acid that would be needed to neutralize 45.3 mL of a 2.57 M aqueous ammonia solution. The equation for the reaction is?
A uniform solid spherical planet of radius 4978000 m produces a gravitational acceleration of 8.9 m/s^2 on its surface. At what two distances from the center of the sphere is the gravitational acce
A new indicator dye, HIn, is to be tested for a pKa experiment. In .100 M acetate buffer (pH = 4.00), the dye is20% In- (base) and 80% HIn (acid). In other words, the pKa is4.60.