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An object is made up of copper and zinc. The mass of the object is 46.2652g and has a density of 9.25 g/cm^3. What percentage of the object is copper? What percentage is zinc?
How long does it take to deposit a coating of gold 1.00um thick on a disk-shaped medallion 4.00 cm in diameter and 2.00 mm thick at constant current of 89 A?
A 1.00 g sample of D2O and H2O are reacted with CL2 and HCL and DCL are produced. Then they are diluted with H2O giving a volume of 1.00L. Then 25 mL of the solution are reacted with excess AgNO3 and 0.3800g AgCl precipitate formed.
The rate constant of a reaction is 7.4 x 10^-3 s-1 at 25 Celsius, and the activation energy is 33.6 kJ/mol. What is k at 75 Celsius?
The molar enthalpy of fusion of ice at 0 Celcius is 6.02 kJ/mol; the molar heat capacity of supercooled water is 75.3 J/(mol-K). (a) One mole of supercooled water at -10 Celcius is induced to crystallize in a heat-insulated vessel.
What must the oxygen content (in percent by volume) be when the total pressure exerted on the diver is 4.0 atm?
When filled withan unknown gas at STP, the container mass is 37.062g. Calculate themolecular weight of the unknown gas, and then state its probableidentity.
Would Br2 react faster with a tropylium cation or cyclooctatetrene? Not sure if the aromaticity of the cation comes into play here. Please justify your reasoning
Draw stereo-formulas for the more stable chair conformation for both cis- and trans-4-tert-butylcyclohexanol and explain why each conformation is preferred.
Can anyone help post a separation scheme for eugenol from cloves using steam distillation first and then extraction
A chemist burns 160 g of aluminum in oxygen to produce aluminum oxide. She produces 260 g of aluminum oxide. Write a balanced equation and calculate the theoretical yield and percent yield.
What is the maximum concentration of Ba2+ that can be added to a solution containing 1.5 X 10^-2M of F- without precipitating BasF2? Ksp = 1.7 x 10^-6
Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water. Density of water is 0.997 g/mL.
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