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How many metric tons (t) of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? Analysis shows that 84.2 g of pitchblende contains 71.4 g of uranium.
A large aquarium of height 5.98 m is filled with fresh water to a depth of D = 2.40 m. One wall of the aquarium consists of thick plastic with horizontal length W = 7.10 m. By how much does the tota
Pure gold is 24 kt, whereas 18 kt gold jewelry typically contains 75% gold, 12.5% silver and 12.5% copper (by mass). Estimate the density of this 18 kt gold alloy.
An electron and a 0.0500-kg bullet each have a velocity of magnitude 450m/s, accurate to within 0.0100%. Within what lower limit could we determine the position of each object along the direction of
How much diesel fuel does it take to charge a mobile phone? One gallon of diesel fuel contains about 1.44E8 J of useful energy.
Two bumper cars of equal mass (m=700 kg) collide head-onelastically. Car 1 was moving to the right at 1.5 m/s before the collision. After the collision, car 1 was moving to the left at 2 m/s. Find t
The gasoline combines with 340.0 kg of oxygen. What is the total combined mass of the carbon dioxide and water produced by combustion in the engine?
A ray of light in air strikes a glass plate (n = 1.50) at an incidence angle of 500. Determine the angles of the reflected and transmitted rays.
A container of cross-sectional area 117 cm2 contains liquid of density 2.4 g/cm3 to a height of 5.10 cm above a small hole of area 1.00 cm2 in the side. Find the flow rate?
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?