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Find the total number of atoms in a sample of cocaine hydrochloride, C17H22ClNO4 of mass 20.0 mg.
Molecular weight and mole concept explained in this solution, The molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255
25 lbs of propane are held in a sealed container at 350 psia. The volume of the container is 3 ft3. Calculate the weight and volumes of the two phases in the container.
Solid aluminum reacts according to the balanced equation. If a total of 830 kJ of heat is produced in the reaction as written, how many moles of Al2S3 are produced?
A Cu/Cu2+ concentration cell has a voltage of 0.24 V at 25M . The concentration of Cu^2+ in one of the half-cells is 1.5×10-3 . What is the concentration of Cu2+ in the other half-cell?
what is the percent Zn in the mixture? (At the same temperature and pressure, the Mg/HCl reaction gave 24.2 L gas/mol Mg.)
A student found that a maximum of 0.800g silver acetate is able to dissolve in 100.0ml of water. What is the molar solubility and Ksp for the salt?
A sample of a gas weighs 2.006 g and has a volume of 1060.0 mL at 795.0 torr and 32.0 degrees Celsius. What is its molar mass?
15.73 grams of a solution containing 8.43% acetic acid, HC2H3O2, is mixed with water and titrated with a 0.523 M solution of KOH. How many milliliters of the KOH solution are required to reach the equivalence point?
What are the concentrations of the various species of the glutamic acid system in a solution which is at physiological pH 7.40, and a total concentration for all forms equatl to 5.00x10^-3M
The balanced reaction has a -2217 kJ. If a steak must absorb 7.2 * 10^-4 kJ to reach a perfect medium rare and only 15% of the heat produced by the barbeque is actually absorbed by the steak, what mass of H2O is emitted into the atmosphere when th..
Add 1mg of alcohol dehydrogenase. Assuming all of the ethanol is converted to acetaldehyde, what will the final concentration of NADH be in the solution
Inorganic phosphorous is spectrophotochemically measured in blood serum by formation of a reduced heteropoly acid (heteropoly blue) and comparison of its absorbance with a standard treated by the same procedure.
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