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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?
Molybdenum crystallizes in a body-centered cubic lattice (the Mo atoms are at the lattice points only). If the density of the metal is 10.3 g/cm3, what is the unit cell edge length in pm?
A cetain weak acid, HA, has a Ka value of 1.4E-7 A) Calculate the percent ionization of HA in a 0.10 M solution. B) Calculate the percent ionization of HA in a 0.010 M solution
what must be happened to the extent of interaction for a much longer hydrocarbon chain like cetane (for example) while Considering that octane molecules are hydrocarbon chains?
A 1.80 M solution of 56 ml is diluted to a volume of 218 milliliters a portion of that solution of 109 milliliters is diluted using 149 milliliters of H2O. determine the final concentration of this solution
Determine the empirical formula of estradiol. The molecular weight of estradiol was later determined to be 272. Determine the molecular formula of estradiol.
A gas occupying a volume of 695 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
If 500 g of KCIO3, decomposes and produces 303 g of KCl, how many grams of O2 are produced?
determine the numerical values for them the subscript hot, cold, and total stands for the hot brick, the cold brick and the sum of the two.
How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a 45.0 percent by mass solution?
The boiling point of a solution containing 10.44 g of an unknown nonelectrolyte in 50.00 g of acetic acid is 159.2°C. What is the molar mass of the solute?
Write a chemical reaction equation that shows what happens when HNO3 is added to MnCO3. Remember to include the physical state symbols.
If a piece of aluminum with mass 3.90 g and a temperature of 99.3 degrees celcius is dropped into 10.0 cm cubed of water at 22.6 degrees celcius, what will be the final temperature of the system?
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