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Mercury (Hg) has a normal boiling point of 356.7 °C, and a standard heat of vaporization of 59.11 kJ/mol.
Determine what mass of mercury will vaporize in a closed container at 22°Cif it has a volume of 1.7 L of space above the liquid.
wo aliquots of serum are added to 5.00 mL portions of water. To one portion is added 20.0 microL of 0.0750 M KCl solution. The net emission signals in arbitrary units are 23.2 and 68.6, What is the magnitude of the emission signal produced by the s..
The temp rises to 17.9 degrees celsius. Neglecting heat capacity of container, what is the specific heat of the metal? The specific heat of H2O(l) is 4.18 J/(g*degree Celsius)
Calculate the mass of HONH2 required to dissolve in enough water to make 250 ml of solution having a ph of 10.00 kb 1.1 x 10-8
The UV absorbance at 280 nm is another means of protein quantization that does not rely on the production of a colored product for analysis. Illustrate this method of quantization including what aromatic structures absorb at 280 nm.
Two different solutions were prepared. Solution A was prepared by dissolving sodium acetate in methanol and solution B was prepared by adding potassium methoxide to acetic acid.
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7 10-4.
A total of 2.00 of a compound is allowed to react in a foam coffee cup that contains 130 of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 . What is the enthalpy of this reaction. Assume that no heat is lost to t..
If the titrant has a molarity of 0.2750 M and there are 50.00 mL of analyte present, what is the molarity of the analyte?
The density of lead is 11.4 g/cm3 at 25°C. Calculate the volume occupied by 25.0 g of lead.
A coffee-cup calorimeter contains 150.0g of water at 25.1C. A 121g block of copper metal is heated to 100.4C by putting it in a beaker of boiling water.
The pKa of Tris, tris(hydroxymethyl)aminomethane (an acid commonly used in biochemistry), is 8.07. What is the Kb of this acid
Calculate ΔH° for the reaction -> 2 K(s) + 2 H2O(l) 2 KOH(aq) + H2(g) A 4.85-g chunk of potassium is dropped into 1.06 kg water at 24.0°C.
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