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A specific steroid has ?max = 291 nm and molar absorptivity ? = 11,500. What is the concentration of the compound in a solution whose absorbance at 291 nm is A = 0.095 with a sample pathlength of 1.00 cm?
All molecular compounds may have London, dipole-dipole, and hydrogen-bonding intermolecular forces affecting their physical and chemical properties.
Draw two pictures. One of a graduated cylinder filled with liquid in which it is possible to read its volume as 10.oo ml and one of a second graduated cylinder filled with liquid
Salicylic Acid is used to make asprin. Salicylic acid contains 60.8 mass % Carbon, 4.4 mass % Hydrogen and 34.8 madd % of Oxygen. What is the empirical formula for Salicylic acid?
A chemist prepares a solution by dissolving 4.168 g of NaNO3 in enough water to make 200 mL of solution. What molar concentration of sodium nitrate should appear on the label.
What was the wavelength of the second photon emitted?
at a temperature of 520 degrees C, the equilibrium concentration of HI is 0.80 M, of H2 is 0.010 M, and of I2 is 0.010 M. What is the K for the reaction?
What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?
The mixture did not rotate the plane of polarized light before. How had the mold changed the solution to become optically active?
A sample of gas has an initial volume of 2.4 L at a pressure of 855 mm Hg and a temperature of 298 K. If the gas is heated to a temperature of 387 K and expanded to a volume
Do you think you could distinguish between 3-methylcyclohexene and methylenecyclohexane by their GC retention times?
Both stopcocks are opened. The pressure throughout the system is 33.5 mmHg. How many moles of N2 are in the system? How many moles of CO2 are in the system?
what is the volume percent of a solution prepared by dissolving 43 g of NaOH in enough water to make a final volume of 120 ml.
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