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At 25 degree C the heat of fusion of Al is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of Al at 25 degree C.
A solid hydrate weighing 2.691g was heated to drive off the water. A solid anhydrous residue remained, which weighed 2.259g. If the anhydrous residue has a formula weight of 282, How much moles of water are present in one mole of anhydrous salts
600 torr contains 50.0% Helium and 50.0% Xenon by mass. What are the partial pressures of the individual gasses?
Write symbol for bromine.What is the atomic number of it in periodic table?How many protons and electrons are there in the atom of bromine?Give the highhest possible and minimal oxidation number for bromine.Determine its molar mass.
the acidity of substituted benzenes and why it is so. Examples of molecules are p-nitrotoluene compared to m-nitrotoluene.
the Center of Science and Industry (COSI) and saw and exhibit called shadow pictures. It is where you stand in front of this "screen-like board"
Using the alpha diagram for carbonate in a closed system, at what pH would the molar CO2 concentration be approximately equal to the molar bicarbonate concentration
Using bond-line formulas, draw 6 constitutional isomers that have 1) the molecular formula C5H10O, and 2) a three membered ring
7. 0.500 g each of hydrogen, H2, and carbon monoxide, CO, are introduced into an evacuated 250. mL flask. What will be the total pressure (in atm) in the flask at 22ºC? How much of the pressure will be due to hydrogen
You run a metathetical reaction and produce NaCl as one of the products. Since NaCl is soluble in water, how can you ever recover solid NaCl to prove that you made it
A certain metal oxide has the formula MO where M denotes the metal. A 36.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules.
Consider uJT=(dT/dP)H. (this means the rate of change of Temperature divided by the rate of change of pressure at constant enthalpy)
What is the pressure of the gas in this mercury manometer if h = 49 mm and atmospheric pressure
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