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The specific rotation of a pure enantiomer is known to be +139 degrees g^-1 mL dm^-1. A sample containing both enantiomers is found to have an observed rotation of +0.87 degrees in a one dm tube at a concentration of 0.025 g/mL. What is the optical purity of the sample? What is the % of the dominant enantiomer in this sample?
If the methane contained in 4.00 L of a saturated solution at 25 C was extracted and placed under STP conditions, what volume would it occupy?
How many kJ of heat are required to produce 13.7g NO2, by 2NO2+ O2 --> 2NO2. the heat of reaction is 113.04
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
What mass of sucrose should be combined with 479 of water to make a solution with an osmotic pressure of 8.00 at 315 ? (Assume the density of the solution to be equal to the density of the solvent.)
determine the empirical formula of a substance (Vanillin) that contains 63.15% carbon, 5.30% Hydrogen, and 31.55% oxygen.
The GMC Sierra 15 Hybrid 2WD, a hybrid electric vehicle, has an EPA gas mileage rating of 23.0 mi/gal on the highway. How many kilometers can the Sierra 15 Hybrid 2WD travel on the amount of gasoline
What mass of potassium can be produced by the reaction of 215 g Na with 296 g of KCl?
How many moles of NH3 can be produced from the reaction of 0.5 moles of N2 with that amount of H2?
Purification of nickel can be acheived by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an electrolytic cell
For a formaldehyde and bisulfite reaction, discuss in detail the effect of changing the concentration on reaction rate with respect to each reactant
If I add 1.65 L of water to 112 grams of sodium acetate...What is the molality of NaC2H3O2 in this solution?
what are the molar concentrations for Na+, Cl-, OH- in the resulting solution? Assume a total volume of 100 mL.
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