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Dimethyl sulfoxide is an important polar aprotic solvent that can dissolve both polar and nonpolar compounds and is miscible in a wide range of organic solvents as well as water. Because it penetrates the skin very readily, it is sometimes used as a vehicle for topical application of pharmaceuticals.
Draw the structure of dimethyl sulfoxide. Include any nonbonding electrons on sulfur, and minimize formal charges by allowing sulfur to expand its octet.
Explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio of the yeast reduction product could not be determined by 1 H NMR.
If the molar enthalpy of water is 6.009 kJ/mol, how much energy is needed for 4.5 moles of ice to melt at STP?
How many grams of water can be cooled from 30 degrees C to 18 degrees C by the evaporation of 49g of water? (The heat of vaporization of water in this temperature range is 2.4kJ/g . The specific heat of water is 4.18J/k
Suppose that Part II of the experiment were carried out with aqueous NaOH (sodium hydroxide) instead of Ba(OH)2 to form soluble Na2SO4
If the pressure of CO2 is 0.550 atm, what concentration of carbon dioxide can be dissolved in water at 0.00C.
At a pressure of 1.00 atm and a temperature of 20ºC, 1.72 g CO2 will dissolve in 1 L of water. How much CO2 will dissolve if the pressure is raised to 1.35 atm and the temperature stays the same?
What is the molarity of the HCl solution if 270 mL of the HCl solution reacts with magnesium to produce 7.40 L of H_{2} gas measured at STP.
When determining the pressure of dry hydrogen gas, explain how the measured atmospheric pressure is corrected for the presence
At constant temperature and pressure, how many liters of oxygen would be needed to completely combust 0.350 L of propane?
Use the concentrations given below for the concentrated chemcal molarities and write out your calculations to obtain the volume of each stock solution needed to obtain 30.00 L of a 6.00 M
Draw the structures of salicylic acid and aspirin. Circle and identify the functional groups present in each compound and sulfuric acid is a catalyst. What does that mean?
If 50.0 of ethanol (density 0.789g/mL) initially at 6.0 is mixed with 50.0 of water initially at 28.2 in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
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