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X-ray diffraction measurements on a recently discovered crystalline form of La revealed that La crystallizes in a body-centered cubic lattice in which the unit cell edge length is 426.3 picometers. Compute the atomic radius of the La atoms in this crystal based on the normal assumption that the atoms are tightly packed in the unit cell.
Evaluate the height of the waterfall if the water temperature is 0.213 C warmer at the bottom than the top. Gravitational potential energy is given by mgh where m is the mass of a given amount of water and h is the height of the water. Explain the..
r-134a is throttled from 1200kpa and 40oc to 200kpa. it is known that heat of 5kjkg is lost from r-134a to the
a 64g piece of ice at 0 degrees celsius is added to a sample of water at 7 degrees celsius. all of the ice melts and
Assuming the gasoline is pure octane (C8H18), how many liters of CO2 at STP will be produced from the combustion of 1.00 liter of gasoline. (assume the density of gasoline is 0.963 g/ mL).
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
An aqueous solution containing 34.9g of an unknown molecular (nonelectrolyte) compound in 144.7g of water was found to have a freezing point of -1.4 degree celsius
Calculate the molar mass of a vapor that has a density of 1.58 g/L at 23.2 oC and 610. torr. 2. If the volume of a container is 39.4 L. and the container holds a gas at 13.2 oC. and 7.00x104 torr.
If 4.50 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
50.00 mL of wastewater is diluted with 100.0 mL of distilled water as well as then titrated using the Mercuric Nitrate method. A diphenylcarbazone endpoint is reached after addition of 14.31 mL of 0.01962 M Hg(NO3)2. Define what is the chloride co..
What is the percent yield of CaO in the reaction CaCO3 yield CaO + CO2 if 5.33 g of CaO are obtained when 10.0 g of CaCO3 are used?
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
Seperate this redox reaction into its component half reactions( use the symbol e- for an electron)
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