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Explain the fundamental difference between singlet and triplet state. From this fundamental difference explain why phosphorescence takes at least 100,000 times more to occur than fluorescence.
Suppose you have made 1L worth of a mixture of methanol and water, by mixing 3 parts of methanol and 2 parts of water by mass. Assume for simplicity that the volume of the mixture is exactly equal to the sum of the volumes of the ingredients
Concentration Units Conversions, Lethal concentration (50 percent kill): 2,485 mg/m3/4 hour... this is for a rat
What is the expected freezing point of an aqueous solution of 2.62 kg of nitric acid, HNO3 , in a solution with a total mass of 5.91 kg? Assume that the nitric acid is completely ionized.
What is the concentration in mol/L of a solution with 8.52g MgCl2 dissolved in 150.0ml of solution. What is the concentration of Mg2+ and Cl- ions.
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2.
Draw any one of the skeletal structure of a secondary alkyl bromide with a molecular formula C6H13Br and two stereogenic centers. Indicate chirality by using wedge and hash wedged notation.
Freon-12 is used as a refrigerant in central home air conditioners. The rate of effusion of Freon-12 to Freon-11 (molar mass=137.4g/mol) is 1.07:1. The formula of Freon-12 is one of following: CF4 , CF3Cl , CF2Cl2 , CFCl3 , OR CCl4 . Which formula..
What is the molarity of a solution of 12.0 g of NH4Br in enough H2O to make 240 mL of solution?Answer in units of M.
Procedure for Using Hess's Law; for Part C, What is the enthalpy for the following reaction
The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 × 104 g/mol. Zn is 0.218% by mass of the protein.
What is the osmotic pressure of a solution made from dissolving 60.0 of glucose, , in 550 of water at 45.0
Calculate the molar solubility of calcium oxalate (CaC2O4) in a 0.080M calcium chloride solution. The Ksp of calcium oxalate is 2.3*10^-9
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