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If 1.0 μg/ml of pigment X shows an absorbance of 0.059 at 370 nm, then what is the concentration of a solution of pigment X that shows an absorbance of 0.443 at 370 nm? (Assume linearity.)
calculate the SCF energies and the relative energies of the keto and enol tautomers of ethanal(acetaldehyde) in Kcal/mole
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount from pure gasoline.
A solution contains 0.0470 M Ca2+ and 0.0292 M Ag+. Can 99.00% of Ca2+ be precipitated by sulfate, without precipitating Ag+ (For CaSO4, Ksp = 2.4 10-5. For Ag2SO4, Ksp = 1.5 10-5.) Yes or No What will be the concentration of Ca2+ when Ag2SO4 begi..
The temperature of the mixture is 0 \rm ^{\circ}C , and the total pressure is 1.00 \rm atm . How many grams of helium are present in the gas mixture?
Identify how precitipation reactions can be used in the water treatment and purification processes to help maintain a safe municipal water supply.
In the synthesis of methyl salicylate from salicylic acid, there are density of methyl salicylate, methylene chloride and methanol. Why might the layers "switch" during the extraction
A reaction has a rate constant of 0.0810 sec-1, how much of the compound (in mol/L) is left after 0.752 min, if there was 0.303 mol/L at the start
3AgNO3 + Na3PO4 --> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced?
When you heat baking soda (NaHCO3), it breaks down into sodium carbonate powder (Na2CO3), carbon dioxide and water vapor. Write a correct thermo chemical equation and explain what it tells you about the reaction ( The enthalpy of this reaction is ..
Calculate What will be the volume of this gas sample at standard atmospheric pressure and
How many grams and pounds of washing soda are needed to remove the hardness from 500 gallons of water that has a hardness of 150 ppm CaCO3?
53.8 percent nitrogen. At 25oC and 750 mm Hg, 1.05 g of this gas occupies a volume of 0.500 L. What is the molecular formula of the gas?
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