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The concentration of cadmium in seawater can be determind spectrophotometrically. To six 50.0mL seawater samples, various volumes of a 10.0ppm cadmium solution were added and all were taken through the analytical procedure with the following results:
Amount Cd Added (mL): Absorbance:
0 0.23010 0.27225 0.34040 0.41660 0.50775 0.568
Construct a standard addition calibration plot using EXCEL and calculate [Cd] in seawater in ppm (µg)/mL.
What is the equilibrium constant for the reaction at 87 °C? (R = 8.314 x 10â€"3 kJ/K.mol)
The spherical r theta phi equation needs to be used but am having difficulty with the integral of the equations.
What is Valence Electrons, Bonds Electrons,Non-Bond, VSEPR, Approx bond Angle, and Geometric Shape of H20
What is the PH of a solution prepared by dissolving 5.3g of lithium hydroxide in water to give 280ml of solution.
A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas.The sulfur dioxide reacts with solid calcium oxide to form solid calcium sulfite CaO(s)+SO2(g)?CaSO3(s),S(s)+O2(g)?SO2(g)
What is the temperature of 0.46 mol of gas at a pressure of 1.3 atm and a volume of 11.7 L ? Express your answer using two significant figures.
Write the net ionic equation that shows the neutralization reaction when the strong acid or strong base is added to the buffer.
A closed end manometer was constructed from a U-shaped glass tube which was 80.0 cm high. It was loaded with mercury so that the closed side was filled all the way to the top
which caused the CO2 in the sample to precipitate as BaCO3. The excess base was back-titrated to a phenolphthalein end point with 23.6ml of .0108 M HCl. What is the concentration of CO2 in the air in parts per million? use 1.98g/L for the density ..
Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 865 mL of a 36.0% (w/v) sucrose solution?
An X-ray beam of unknown wavelength is diffracted from a NaCl surface. If the interplanar distance in the crystal is 287pm and the angle of maximum reflection is found to be 7.28, what is the wavelength of the X-ray beam
The laser in an audio cd player uses light with a wavelength of 7.80* 10^2nm. Calculate the frequency of the light.
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