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An element has ccp packing with a face-centered cubic unit cell. Calculate the molar mass (g/mol) of the element to three significant figures.
A particle with a charge of 4C and a mass of 12kg is travelling in a circular path around a fixed particle of charge -3C. The velocity is observed to be 3x10^3 meters per second. What is the radius
Suppose that the reaction is carried out at 300C and 3.00 atm. 1.00 grams of iron (III) nitride reacts. What volume of molecular hydrogen is required?
Two vehicles approach a right angle intersection and then collide. After the collision, they become entangled. If their mass ratios were 1:3 and their respective speeds as they approached were both
Why does the dehydration of beta-hydroxy ketone occur so readily to produce the alkene compared with all the unsuccessful effort to dehydrate an alcohol under basic conditions?
A 1200 kg cannon fires a 100.0 kg cannonball at 97 m/s. What is the recoil velocity of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.
If the average molar mass of uranium in a reactor is 236.62, what percent of the fuel consists of the lighter isotope?
A 0.646 m string is clamped at both ends. If the lowest standing wave frequency in the string is 326 Hz, what is the wave speed?
Having found the minimum kinetic energy of an alpha particle inside a nucleus to be roughly 2.0 Mev, and given that the typical kinetic energy of an emitted alpha particle is 5.0 MeV, is actually po
Many people think salt is added to water to increase the boiling poing so pasta will cook faster. How much salt would be needed to be added to 4L of water to raise the boiling point by 5 degrees
Assuming an ideal solution, what is the predicted freezing point of a 0.01 m (molality) aqueous solution of NaHPO4? Kf of water = 1.86 deg C/m.
Estimate the mass of water that must evaporate from the skin to cool a body by 0.30, if the mass of the body is 94 and its heat capacity is 4.0 .
If a pilot lets go of a rescue package and it lands on the island, how fast was the plane traveling? what was the final velocity of the package right before it hit the ground?
Solid ammonium carbarnate dissociates as indicated. If at equilibrium PNH3 = .035atm, what is PCO2? In another experiment it is observed that PCO2 = .025atm, what is PNH3?
A handball of mass 0.15 Kg, traveling horizontally at 25m/s, strikes a wall and rebounds at 19m/s (a) What is its linear momentum BEFORE the impact?
What fraction of the nuclei in a tritium sample will remain after 3.50 yr?
Question: A 10-cm-long thin glass rod is uniformly charged to 50 nC. A small plastic bead, charged to - 5.4nC , is 4.5 cm from the center of the rod. What is the magnitude of the force on the bead?
What is the field strength a point on the axis 5 cm from one disk between them? (N/C)
What mass of silver nitrate must be placed into a 500 mL volumetric flask, dissolved, and diluted to the mark with water?
Question: A mirror produces a 10 cm high image of an object that is only 4cm high. if the image is also real and inverted, then magnification of the mirror is.
A microwave oven operates at 2.4 GHz with an intensity inside the oven of 2500 W/m^2. What is the amplitude of the oscillating electric field?
The intensity of electromagnetic radiation from the sun reaching the earth's upper atmosphere is 1.37 kW/m^2
What is the minimum amount of electrical energy required by the refrigerator to carry out this process if it operates between reservoirs at temperatures of 20.0 °C and -20.0 °C?
A solid mixture of KCl, KNO3, and Ba(NO3)2 is 20.92 mass % chlorine, and a 1.000 g sample of the mixture. What are the mass percents of KCl, KNO3, and Ba(NO3)2 in the mixture?
A man and a boy are carrying a uniform wooden beam that is 8 m long and weighs 900 N. The boy lifts at one end. At which distance from the boy does the man have to hold the beam so that he lifts twi