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An iron ore was found to contain 92.0% pyrite (fool's gold). Pyrite has the formula FeS2and is 46.5% iron. How many grams of iron are there in 65.8 grams of iron ore
A stone thrown horizontally from a height of 5.87 m hits the ground at a distance of 13.90 m. Calculate the initial speed of the stone
A water sample contains 118mg/L of bicarbonate ion, 19mg/L of carbonate ion, and has a pH of 9.5. What is the alkalinity of this water expressed as mg/L of CaCO3
One type of slingshot can be made from a length of rope and a leather pocket for holding the stone. Determine the angular speed of the stone at the moment of release
For 2.25 moles of an ideal gas, Pext=P=200x10^3 Pa. The temperature is changed from 122 C to 28.5C and Cv=3R/2. Calculate the q, w, delta U and delta H for an isochloric process.
Two air-track gliders of eual mass are initially moving in the same direction along a straight line, what are the speeds and directions of the gliders after the collision
A light spring-gun projectile launcher is mounted on an .443 kg air track glider. find the speed of the air-track glider after the gun is fired
Calculate the mass of nitrogen dissolved at room temperature in an 76.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78
A bird watcher meanders through the woods, walking 0.506 km due east, 0.736 km due south, Determine the magnitude (in kilometers) of the bird watcher's displacement
A piece of silver is dropped in a container of water, write net ionic equation
1.75 moles of an ideal gas, for which Cv,m =3R/2, initially at 32.0 C and 2.50*10^6 pa undergoes a two-stage transformation. For each of the following states described in the following list, calcula
A pump lifts 320kg of water per hour a height of 3.5m. find the minimum necessary power output rating of the water pump
A 3000kg rocket and its 500 kg payload are traveling at a speed of 2000m/s. what is the velocity of the payload after separation
A girl swings back and forth on a swing with ropes that are 4.00m long. The maximum height she reaches is 1.50m above the ground, What is the girl's maximum speed
A .14kg baseball with an initial speed of 28m/s rebounds with a speed of 34m/s after being struck with a bat. What was the average force between ball and bat
In an adiabatic compression if one mole of an ideal gas with a Cv=5R/2, the temperature rises from 293 K to 325 K. Calculate the heat, work, change in enthalpy and change in internal energy
What is the total negative charge, in Coulombs, of all the electrons in a small 0.750 g sphere of carbon
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 21m that makes an angle of 50? with the vertical, Calculate Tarzan's speed just before he reaches Jane
Tell which of the following compounds is likely to have a dipole moment, and show the direction of each. (a) SF6 (b) H2C=CH2 (c) CHCl3 (d) CH2Cl2
A wire segment of length 4.75 cm carries a 3.46 A current. This wire is placed within a uniform magnetic field. find the angle between the two orientations of the wire
During the isomerization of trans-1,2-dibenzoylethylene C16H12O2 using 95% Ethanol C2H6O , and UV light irradiation. What is the overall equation for this reaction. What is the product
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.744 rev/s. find the initial and final kinetic energies for this system
Tasha with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. What is the power of the lens she uses
A film of oil with refractive index 1.45 floats on water with refractive index of 1.33. Determine the thickness of the oil film
You push with a horizontal force of 50.0N against a 24.0N box, pressing it against a rough wall to hold it in place. what is the friction force of the box