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Calculate the change in entropy of the universe when 1 mol of water vapor at 100°C condenses to liquid water at 100°C in a thin flask in an ambient laboratory temperature of 25°C.
A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min (assumed constant) on its way to the catcher's
a typical person has about 200 mg of cholesterol per 100 ml of blood.if the total blood volume of an individual is 5.0 L,how many grams of total blood cholesterol does the individual contain?
The specific heat of air at normal pressure is 1.015J/g.C. What is the change in air temperature, assuming the heat from the steam is all absorbed by air?
A 0.570-kg ball is dropped from rest at a point 4.40 m above the floor. The ball rebounds straight upward to a height of 3.20 m. Taking the negative direction to be downward, what is the impulse of
The magnitude of F is 306 newtons and it points at 93o measured counterclockwise from the positive x-axis. What is the y component (in newtons) of F?
A parachutist with a camera, both descending at a speed of 11 m/s, releases that camera at an altitude of 140 m. What is the velocity of the camera just before it hits the ground?
What is the rate of energy transfer by radiation from a metal cube 2.1 on a side that is at 750? Its emissivity is 0.40.
Methane reacts with oxygen to form carbon dioxide and water as shown: CH4 + 2O2 = CO2 +2H2O. If 72 grams of water is formed, how much methane must have reacted?
The springs of a 1000 kg car compress 6.5 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations?
The vinegar sold in the grovery stores is described as 5% v/v acetic acid. What is the mole fraction of acetic acid in this solution?
A rope having a total mass of 0.4 kg and total length of 4 m has a 0.6 m of the rope hanging vertically down off a work bench. How much work must be done to place all the rope on the bench?
Consider the reaction, 2 Al(OH)3 + 3 H2SO4 Al2(SO4)3 + 6 H2O. How many grams of Al2(SO4)3 are generated when 152 g of H2SO4 reacts?
A sealed evacuated container made of a perfect insulating material at 22^circ C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
A firm wants to determine the amount of frictional torque in their current line of grindstones, so they can redesign them to be more energy efficient.
61.0 mL of a 1.20 M solution is diluted to a total volume of 288 mL, a 144 mL portion of that solution is diluted by adding 177 mL of water. What is the final concentration?
Suppose one green pepper has a mass of 125 grams. The pepper was homogenized with water and titrated coulmetrically (constant current) with iodine. After 15 minutes, at 70.00 mA the starch end point
A superhero flies 305 m from the top of a tall building at an angle of 33? below the horizontal. What is the horizontal component of the superhero's displacement?
A 0.570 kg ball is dropped from rest at a point 1.50 m above the floor. The ball rebounds straight upward to a height of 0.800 m. What are the magnitude and direction of the impulse of the net force
Suppose you were doing work to develop a better, longer lasting lithium ion battery. Your new version has a reported Ecell voltage of 3.42 compared to the SCE reference. What would the cell potentia
A 50.0 g sample of solid ammonium carbonate is placed in a closed evacuated 3.00 L flask and heated to 400 degrees C. Calculate total pressure inside the flask at equilibrium.
After a day of testing race cars, you decide to take your own 1430 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 32.0 m/s in 10 s. What is the aver
A 146.6-g sample of a metal at 75.0°C is added to 146.6 g of H2O at 15.0°C. The temperature of the water rises to 17.8°C. Calculate the specific heat capacity of the metal, assuming that
One mole of Ar initially at 325 K undergoes an adiabatic expansion against a pressure P external = 0 from a volume of 10.5 L to a volume of 92.0 L. Calculate the final temperature using the ideal ga
What is the total magnetic flux through the surface? Choose directions for the area vectors so that the flux through each surface is positive.