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A 0.8870 g sample of a mixture of NaCl and KCl is dissolved inwater and treated with excess AgNO3 to yield 1.822 g ofAgCl. Calculate the percent by mass of each compound in the mixture.
Two converging lensees, the first with focal length 25 cm and second with the focal length 20 cm, are separated by 30 cm. A 4 cm tall object is placed 50 cm infront of the first lens. What is the hi
Suppose the insulating qualities of the wall of a house come mainly from a 3.5 inch layer of brick and an R-19 layer of insulation, as shown in Fig. 14-19.
To eliminate the safety hazard created from the first reaction(decomposition of sodium azide (NaN3) into sodium andnitrogen), the sodium produced is reacted with potassium nitrate toyield sodiu
Suppose the volume inside an airbag was fixed at 55 liters and temperature remained constant. What would be the new pressure inside the bag, as now additional nitrogen was present?
The pressure of 5.0 L of an ideal gasin a flexible container is decreased to one-forth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the f
A flask is sealed at 600 K with partial pressures of H2 = 1.98atm and I2 = 1.71 atm. The gases react to form HI according to the equation above. Determine the partial pressure of each gas at equilibr
How is the phenomenon of temp explained on the basis of the kineticmolecular theory? what microscopic property of gas moleculesis reflected in the temp measured?
At a particular temperature,N2O5 decomposes according to first-order kinetics with a half-lifeof 3.0 seconds. If the initial concentration of N2O5 is 9.2x10^-2M,what will be the concentration of N2O
Determine the activation barrier for the reaction. What is the value of the rate constant at 18 degree Celsius?
A 5 kg box with initial speed 4 m/s slides across the floor and comes to a stop after 0.7 sec. a. What is the coefficient of kinetic friction ? b. How far does the box move ?
A computer disk drive is turned on starting from rest and has constant angular acceleration. If it took 0.540 for the drive to make its second complete revolution, how long did it take to make the f
A circular coil of wire 8.20 cm in diameter has 15.0 turns and carries a current of 3.20 A. The coil is in a region where the magnetic field is 0.650 T . Part A: What orientation of the coil gives t
A 10.7kg ball travels at 3.5m/s west when strikes a stationary 2.4kg ball. the larger ball moves off at 2.1m/s 45 degrees north of west, while the lighter ball moves off at an unknown velocity. What
What is the energy in joules per mole of orange light having awavelength of 625 nm? The speed of light is 3.00 X108m/s; Plank's constant is 6.626 X10-34 J s and Avogadro'snumber is 6.022 X1023.
Consider a piston-cylinder device that contains nitrogen gas as the system. Initially, the system is at 1 MPa and 427°C. It now undergoes an isobaric process until its temperature is 27°C. D
A mixture contains 2.54g eucalptol, 1.76g menthol, 3.21g methyl salicylate, and 1.95g thymol in 205.28g water. What is the percentage composition by mass for each component in the mixture? There are
A thick-walled spherical shell of charge Q and uniform volume charge density p is bounded by radii r1 and r2 > r1. With V = 0 at infinity, find the electric potential V as a function of distance
A solid uniform metal sphere of radius has a density of 8.00 . If you carefully scrape away the outer part so that the radius of the resulting sphere is now , its density will be?
Describe and analyze the forces acting on the Nerf toy and projectile (by all actors on the toy and projectile);
Solid carbon dioxide (CO2, dry ice) goes directly from a solid to agaseous state at -78°C . (Heat of sublimation=25.2 kJ/mol ) Calculate the amount of heat required for sublimation of 20.5g of d
An electron with kinetic energy 4.80 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 38.0 cm. Find the following values.
The decomposition of dimethyl ether, (CH3)2O(g) ® CH4(g) + H2(g) + CO(g), is first-order with a half-life of 1733 s at 500oC. In an experiment at this temperature, if [(CH3)2O]is 0.
An electron that has velocity = (3.7 x 106 m/s) + (3.0 x 106 m/s) moves through a magnetic field = (0.03 T) - (0.15 T) . (a) Find the force on the electron and its direction.
The vapor pressure of pure C2H5OH at30oC is 71.2 mm Hg and that of pure CCl4 is121.6 mm Hg. Calculate the vapor pressure of a solution containing20.00g of C2H5OH and 60.00g ofCCl4, assuming ideal