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The Beer's Law slope for the Fe-phenanthroline complex is found to be 0.2100 L/mg Fe. The absorbance of the diluted unknown solution made in accordance with the instructions in the exercise is found to be X where X=.645. Explain what is the concentration of the original unknown solution?
Calculate the wavelength of a neutron that has a velocity of 250 cm/s.
a if the electron in a hydrogen atom undergoes a transition from an n 6 level to an n 4 level what is the wavelength
What is the concentration of Magnesium, Cholride, Silver, and Nitrate Ions at the end of the reaction
Suppose that 50.0 mL of a 0.0500 M solution of Pb(NO3)2 is mixed with 40.0 mL of a 0.200 M solution of NaIO3 at 25°C. Calculate the [Pb2+] and [IO3-] when the mixture comes to equilibrium. At this temperature, Ksp for Pb(IO3)2 is 2.6x10^-13.
An acid with a Ka of 1 x 10-8 is titrated with NaOH, both solutions being 0.020 M. What should the Ka of the indicator be, in order to obtain the best end point
An aqueous solution of CaCl2 has a vapor pressure of 83.0mmHg at 50 C . The vapor pressure of pure water at this temperature is 92.6mmHg .
Which of the following are not soluble in water? Remember that the solubility rules apply to ionic compounds, but not necessarily to covalent compounds
Chloromethane,CH3Cl, arises from the oceans and from microbial fermentation and is found throughout the environment. It is used in the manufacture of various chemicals and has been used as a topical anesthetic.
a 1.0 ounce piece of chocolate contains 15 of caffeine and a 6.0 ounce cup of regular coffee contains 105 of caffeine.
What factor is extremely important when analyzing the mercury content of samples when near the detection limit
How many moles of carbon monoxide react with 1 mole of oxygen gas according to the balanced chemical equation?
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
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