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An airplane weighing 25 metric tons leaves ground and flies to a height of 36,000 feet and attains a velocity of 575 miles/hour. What change in energy is involved? I mile = 1609 meters; I inch = 2.54 cm; and g = 9.81 m s-2)
It is known that the ^2P terms lies at 670.78nm above the ground state. whcih is 1s^2 2s^1 ^2S. calculate the ionization energy ofthe ground state atom
What pH is needed to increase the solubility of Mn(OH)2 to 2.5 x 10-3M? Ksp for Mn(OH)2 = 1.6 x 10-13
determine the theatrical yield if 1.56 grams of hydrogen is permitted to combines with 9.70 grams of nitrogen producing
A 0.1225-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/° C. The calorimeter contains exactly 261 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg,..
CaC2 + 2H2O --> C2H2 + Ca(OH)2. Using this equation, determine how many moles of CaC2 are needed to react completely with 49 g H2O.
A gas mixture contains 1.30g N2 and 0.95g O2 in a 1.57-L container at 22 degrees Celsius. Calculate the mole fraction of N2.
a stell cylinder has a length of 2.16in a radius of 0.22in and a mass of 41g. what is the density of the steel in gcm
A 275mL sample of O2 is collected over water at 60 degrees C the total pressure 755 torr what is the volume of O2 at STP?
Nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation N2(g) + 3H2(g) = 2NH3(g). Delta H(rxn)=-56 kJ.
The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.300 M NaOH. B. What was the initial concentration of HCl?
calculate the heat of hydrogenation of naphthalene. Does this value provide any evidence for aromatic character in naphthalene?
find the vapor pressure of water solution in which the molefraction of HgCl2 is 0.163 at 25 degrees celcius.
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