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The formula of the complex MXn can be determined by the mole-ratio method. Solutions are prepared in which the concentration of M is held constant and that of X is varied. The absorbance of the complex is measured.The following data were obtained by mixing solutions A, 0.0100 molar in M, solution B, 0.01200 molar in X, and solution C, 0.100 molar in HClO4.mL A mL B mL C Absorbance4 0 16 04 1 15 0.1254 3 13 0.3754 4 12 0.54 5 11 0.6254 6 10 0.754 10 6 14 12 4 1
Plot the absorbance against the ration of moles of X to moles of M. Calculate the formula of the complex from the mole ratio at which the absorbance reaches a maximum and levels off.
An impure sample of potassium hydrogen phthalate, KHP, having a mass of 84.02 g was dissolved in water. This acid sample was neutralized by the addition of 536.0 mL of 0.125 M NaOH.
Consider a carbon atom in its ground state. Would such an atom offer a satisfactory model for the carbon of methane? If not, why not
An 8.00 g sample of SO3 was placed an evacuated container where it is decomposed at 600 degrees C according to the following reaction.
Using the dumas method, you find that a sample weighing 71.6mg gives 3.84mL of nitrogen gas at 23 deg.celcius and 785 mmHg. What is the volume of nitrogen at STP?
A saturated solution of BiI3(s) is found to have an I- concentration of 3.96E-5 M. What is the value of Ksp for BiI3?
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
How much 1.0 M NaOH must be added to a 100 ml of 10 mM H3PO4 to raise the pH of the solution to 7.0? B) If 2 volumes of 2.0 M Na2HPO4 are added to 1 volume of 0.1 M H3PO4, what is the pH of the resulting phosphate buffer?
The Tank contains how many grams of oxygen gas? A steel cylinder with a volume of 12.50 L contains oxygen gas at a pressure
Assuming electrons with quantum numbers (n,l,mt,ms), how does an electron with the quantum numbers (2,1,1+1/2) differ from an electron with quantum numbers (2,1,-1,+1/2)?
What is the pressure inside a system when the system-side column in an open mercury manometer is 75.0 mm lower than the atmosphere side when the atmospheric pressure is 735 mm Hg.
A gas sample was collected over water at 25.3 degrees C. The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected
find the molarity of 0.5 grams of sodium chloride is dissolved to make 0.05 ml of solution
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