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A locomotive pulls a train along a straight, horizontal track at constant velocity. What horizontal forces act on the train and the locomotive
A reaction has a standard free-energy change of -10.60 kJ mol-1 (-2.533 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C
A thin film of acetone (n = 1.25) coats a thick glass plate (n = 1.50). White light is incident normal to the film. Calculate the thickness of the acetone film
When a liquid and its vapor are in equilibrium, the rates of evaporation of the liquid and condensation of the vapor are equal. Compute the rate of evaporation of mercury into a vacuum
A solution is prepared by dissolving 43.7 g cesium chloride in 60.0 g water. The volume of the solution is 63.3 mL.
How much heat (in kf ) is evolved in converting 1.00 mol of steam at 150.0 C to ice at -45.0 C? The heat capacity of steam is 2.01 j/g*C and of ice is 2.09 j/g*C .
To find the mass of water use the density of water = 1.0 g/mL. I have looked at multipule different solutions that have already been worked but have not been able to get the correct answer no matter
what is the internal energy change of a gas gives off 312 of heat while being compress 862mL by a pressure of 1.64 bar. what are internal energy change in surrounding and universe for the process
One solenoid is centered inside another. The outer one has a length of 55.0cm and contains 6800 coils, Find the emf induced in the inner solenoid
Because the potential of pH electrodes can vary, it is necessary to CALIBRATE a pH electrode before use. For many uses, a two-point calibration procedure is appropriate.
what is the dimension of gravitational force and what is the dimension of acceleration
the molar mass of a nonelectrolyte is 58.0 g/mol. Compute the boiling point of a solution containing 31.2g of this compound and 600.0 g of water
What is a gyroscope? Discuess the role of angular momentum in operation of a gyrosope. Provide examples of pratical applications of gyryscopes
For the reaction shown, compute the theoretical yield of the product (in grams) for each of the following initial amounts of reactants
Two skaters with masses of 66kg and 51kg , respectively, stand 7.5m apart, each holding one end of a piece of rope. how far does each skater travel
Write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water, H2O. Phases, such as (aq) or (l), are optional.
At a county fair, two children ram each other head-on while riding on the bumper cars. Jill and her car, traveling left at 3.20m/s, determine the speed of Jill and her car after the collision
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 5.0 s, it rotates 45 rad. What was the angular acceleration during this time
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L 1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L 1 NaOH(aq) to neutralize the excess,
For a movie scene, a 76kg stuntman drops from a tree onto a 51kg sled that is moving on a frozen lake with a velocity of 13m/s toward the shore. with what speed does he leave the sled
a copper wire is strectched with a stress of 10ksi at 20deg C. If the length is held constant, to what temperature must the wire be heated to reduce the stress to 5ksi
Suppose an ideal monatomic gas at an initial temperature of 475 K is compressed from 3.20 L to 2.15 L while its pressure remains constant at 1.01 105 Pa. Find the work done on the gas.
If a zinc surface is corroding at a current density of 3.45x10^7 A/cm what thickness of metal will be corroded in 210 days
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 85m long and your own ship to be 100 m long. How fast is Maria moving relative to you
what is the enthalpy change corresponding to the melting of 2.5 moles of H2O? what is the system? What is the surrounding? In what direction does the heat flow? Is the process endothermic or exother