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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?
The analysis of this compound shows that it contains 41.8 percent C, 4.7 percent H, 37.3 percent O, and 16.3 percent N. Calculate the molecular formula of the compound.
the pH of the two equivalence points and the volume
Calculate How many grams of pure, solid sodium hydroxide are needed to make 500 mL of 0.15M NaOH solution and also express the answer in just 2 significant figures?
The standard reduction potential for Zn2+ is -0.76 volt and that of Cu2+ is 0.34 volt.a) Write the cell diagram for the Daniell cell (NH4NO3 salt bridge).
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.
State whether each of the following experimental errors would raise or lower the mass of the recovered product:
Iron crystallizes in a body-centered cubic structure. The volume of one Fe atom is approximately 8.37 10-24 cm3, and the density of Fe is 7.874 g/cm3. Calculate an approximate value for Avogadro's number.
Using appropriate equations, explain why combustion of fuels containing sulfur leads to acid rain.
Write and balance the equation for the complete combustion of ethane, C2H6. You do not need to include any phase symbols
Organic Chemistry-In the mass spectrum of butylbenzene, the base peak occurs at m/z
Calculate the frequency of the light emitted when an electron in a hydrogen atom
A sample of calcium nitrate, Ca(NO3)2, with a formula weight of 164 g/mol, has 5.00 x 1025 atoms of oxygen. How many kilograms of Ca(NO3)2 are present
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