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1. Write the reaction for the formation of 1 mole of acetic anhydride from 2 moles of acetic acid. Why is the product described as an "anhydride?"2. The synthesis of aspirin is carried out with 3.25 grams of salicylic acid as the starting material.a) What is the minimum amount of acetic anhydride that must be used?b) If the final amount of aspirin produced represents a 75.0% yield, how much aspirin is produced?
Insert a stick in each hole of a model carbon atom and mentally draw imaginary lines between the ends of the sticks.
RNA-based viruses such as poliovirus use RNA as their genetic storage material. An important anti-viral drug is ribavirin (see below). RNA polymerase can use ribavirin (the triphosphate version) as a substrate,
Calculate the initial I- concentration in a solution containing 3.0mL of 0.20 M KI, 5.0 mL of 0.15 M (NH4)2S2O8, 5.0 mL of 0.25M (NH4)2SO4,
At 25 degrees Celsius liquid A has a vapor pressure of 100 torr while liquid B has a vapor pressure of 200 torr. The heat of vaporization of liquid A is 32 kJ/mol
hydroxylamine is titrated to the equivalence point with 35.8 m of .15 M HCl. What is the pH at the equivalence point?
A solution of HCl has a pH of 2.50. How many grams of HCl are there in 0.250 L of this solution? How many grams of HCl are in 250mL of an HCl solution that has twice this pH
For the chemical reactions shown below, calculate the number of electrons transferred in the redox process. 2Cr2(O7)2- (aq) + 16H+ (aq) --> 4Cr3+ (aq) +3O2 (g) + 8H2O (l)
A 0.003525-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 24.5oC to 26.7oC.
Benzene's vapor pressure is normally 0.930 atm. A soln of 20.0g unknown molecular solute and 78.11 g benzene has a vapor pressure of 0.900 atm. What's the unknown molar mass. Benzene molar mass= 78.11 g/mole
The following three solutions are mixed: 90.0mL of 0.110M Na2SO4 , 45.0mL of 0.250M ZnCl2 , and 100.0mL of 0.20M Ba(CN)2. What ionic compounds will precipitate out of solution? Express as a chemical formula.
a student placed 16.5 g of glucose rm c6h12o6 in a volumetric flask added enough water to dissolve the glucose by
in what type of material is the energy gap between the valence and the conduction band the greatest? na ge or diamond.
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