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A metal is electrolyzed from aqueous solution by using an electrical current of 1.23 A for 2½ h, and 3.37 g of metal is deposited. In a separate experiment the number of electrons used for the reduction of the metal is 2. What is the metal?
An equilibrium mixture of this reaction(NH4HS(s)?NH3(g)+H2S(g)) at a certain temperature was found to have [H2S]= 0.350M and [NH3]= 0.276M .What is the value of the equilibrium constant (Kc) at this temperature.
Boyle's apprentice observes that the air trapped in air tube occupies 24.8 cm3 at 1.12 atm.by adding mercury to the tube increases the pressure on the trapped air to 2.64atm. assuming constant temperature, determine the new volume of air?
Compute the pressure (in atmospheres) Using the van der Waals equation, exerted by water(H2O) of 23.93 grams at 36.11 degree celsius in a 1.00 Litre container.
Calculate the PH of this solution.
What volume of hydrochloric acid solution of 0.25 M must be diluted to prepare 1.00 L of 0.040 M HCl and calculate Keq at this temperature for the given reaction 2 NOCl (g) W 2 NO (g) + Cl 2 (g) ( reaction is at equilibrium):
A 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml.
Estimate dissociation energy of HF using simpe additivity rule If given that d(H-H) and D(F-F) IN H 2 is 336kj/mol and F2 is 258 kj/mol
A normal value for blood cholesterol is 200mg/dl of blood. If a normal adult has a total blood volume of 5 L, how much total cholesterol is present.
Determine how many grams of Phosphorus tri-fluoride will be produced when 40.1 g of F2 mix, and the reaction has a 78.1% yield?
Determine the molar mass of aspartame and How many moles of molecules are in 10.0g of aspartame?
Evaluate the energy of an electron excited from a hydrogen atom using Bohr's model. Determine the maximum wavelength of energy needed to observe a photoelectric effect for potassium.
Determine how long will it take for a sample of N2O5 to decay to sixty percent of its initial value?
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