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Hydrogen gas at a temp of 22.00C that is confined in a5.00 L cylinder exerts a pressure of 4.20 atm. If the gas is released into a 10.0 L reaction vessel at a temp of 33.6 C, what will be the pressu
What is the minimum coating thickness that will minimize the reflection at the wavelength of 701 nm where solar cells are most efficient?
Hooke's law describes a certain light spring of unstretched length 31.0 cm. When one end is attached to the top of a door frame, and a 7.60-kg object is hung from the other end, the length of the sp
If 34.0 g of solid with a molecular weight of 174.0 g/mole requires21.3 kJ of heat to melt it, what is the molar enthalpy of fusion,in kJ mol-1?
Chemical analysis shows that citric acid contains 37.51% C, 4.20% H, 58.20% O. What is the empirical formula for citric acid?
If the speed of the child at the lowest position is 1.60 m/s, what is the mechanical energy lost due to friction?
The sledge moves a distance of 20.7 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? (b) How much work is
Perspiration has a slight acidity because of the presence of lactic acid (C3H6O3). Suppose weanalyze the perspiration of a chemistry student running late toclass.
What is her kinetic energy at maximum height? What is the gravitational potential energy associated with the athlete?
Aqueous sodium hydroxide is produced commercially by the electrolysis of aqueous sodium chloride. Hydrogen and chlorine gases are also produced. write the balanced chemical equation for the producti
A comet is observed to pass the sun at a distance of closest approach of 4 x10^10 m with a speed of 3 x 10^4 m/s. Will it return, and how long will it take to move 60º arounds its orbit from th
Given that the new organism absorbs light at 840nm, and that you need to perfomre a two electron trasfer, what would the changein redox potential be?
Two long straight wires are parallel and carry current in opposite directions. The currents are 10 amps and 15 amps and the wires are separated by 0.40cm. What is the magnetic field due these curren
An inductor of 3H and resistance of 6 ohms are connected to a battery of emf 12V and of negligible internal resistance. Calculate: (i) the initial rate of increase of current
A 192 g piece of copper is heated to 100.0 deg C and then droppedinto a coffee-cup calorimeter containing 750.0 mL of water at 4.0deg C. What is the final temperature (in degrees C) of the copperand
What should the thickness of the material be for it to be nonreflecting for light of wavelength 640 nm (in nanometers)?
Two sources of light of wavelength 780 nm are 13.0 m away from a pinhole of diameter 0.100 mm. How far apart must the sources be for their diffraction patterns to be resolved by Rayleigh's criterion
An unknown volume of water at 18.2 deg C is added to 24.4 mL ofwater at 30.0 deg C. If the final temperature is 21.5 degrees C,what was the unknown volume of water added, in milliliters?
A film of oil of index of refraction n = 1.37 floats on water (n = 1.33). When illuminated with white light at normal incidence, light of wavelengths 672 and 480 nm is predominant in the reflected l
A 2.97-kg projectile is fired with an initial speed of 133 m/s at an angle of 28° with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.97 kg
Find an expression for the maximum safe period of rotation, T, in terms of the variables given above, and the gravitational acceleration, g.
A steel block has a volume of o.08m3 and a density of 7,840kg m3. What is the force of gravity acting on the block(the weight) in water?
(a) Determine the acceleration due to gravity at that height and find the orbital velocity and the period of the space station. (b) The Hubble Space Telescope orbits at 600 km. What is the telescope
Find the minimum speed at which a car can travel around this curve without skidding if the coefficient of static friction between the road and tire is 0.3. Answer in units of m/s.
It takes 208.4 kJ of energy to remove one mole of electrons from the atoms on the surface of rubidium metal. If rubidum metal is irradiated with 254 nm light, what is the maxium kenetic energy