Experiment of recrystallization of naphthalene
In the experiment of recrystallization of naphthalene,what is the additional step should be added to this procedure to remove impurities insoluble in solvent?
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A 30 gram block of an unknown metal at 86.0oC was dropped into an insulated flask containing approximately 40.0 grams of ice and 30.0 grams of water at 0oC.
Aluminum oxide decomposes to produce aluminum metal and oxygen gas. When 9.8g of aluminum oxide decomposes, how many grams of aluminum are produced?
Assuming that "di-lithium" is very stable and the product of the fusion of two 6Li nuclei, the energy released per kilogram of di-lithium formed in the fusion process is closest to?
Calculate the amount of energy in kilojoules needed to change 135 of water ice at -10 degrees Celsius to steam at 125 degrees Celsius.
Calculate the heat of enthalpy for the reaction:
The molar heat of vaporization of acetic acid, HC2H3O2, is 24.3 kJ mol-1 at its boiling point. How many kilojoules of heat would be liberated by the condensation of 6.52 g of acetic acid?
A mixture of He, Ne and Ar has a total pressure of 0.80 atm and is found to contain 0.55 mol He, 0.94 mol Ne and 0.35 mol Ar. What is the partial pressure (in atm) of each gas?
Calculate the number of carbon atoms in 3.8 moles of methane
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