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A solution of ethanol in water is prepared by dissolving 75.0 mL of ethanol (density= 0.79g/cm^3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Watch for stereochemical implications. Doing the mechanisms would be good practice, too. Question Application of Markovnikov"sRule to the following reaction suggests that a mixture is obtained, but in
Using the average initial pH of your acetic acid solutions, and the average molarity of those solutions, calculate a value of Ka for acetic acid. when initial pH is 2.63 and average molarity is 0.06
Calculate delta Hrxn for the combustion of octane(C8H18), a component of gasoline, by using average bond energies.
A student placed 12.0 g of glucose (rm C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-rm mL mark on
Surface molecules have fewer molecules to interact with than the inner molecules. Values depend on size and intermolecular force strength.
What is the function/purpose of the bromthymol blue in the CO2 experiment?
Solid silicon and solid magnesium chloride form when silicon trichloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation.
Use the Cahn-Ingold-Prelog sequence rules to differentiate between E- (Epposite) and Z- (Zame Zide) olefins. Differentiate between cis- and trans-disubstituted alkenes.
What is the maximum number of electrons that can be accommodated in (a) all the 5g orbitals, 8. (b) all the 6f orbitals, and (c) all the 7s orbitals?
What fragmentation mechanisms might be responsible for these losses? B. What other (lower-mass) fragment peaks can you explain simply?
Hydrogen bonding is found in situations represented by D-H---A where both the donor atom, D, and the acceptor atom, A, are one of the highly electronegative elements O, N, or F. NH2Cl falls into this
What is the final temperature of the solution? Assume that the specific heats of both pure H2O and the solution are the same, 4.18J/(k*g).
What mass of silver chloride can be prepared by the reaction of 130.0 mL of 0.15 M silver nitrate with 190.0 mL of 0.30 M calcium chloride?
if the solubility of AgNO3 at 40oC is 211 g per 100 g of water, what mass of this solute can be dissolved in 350 g of water at the same temperature?
Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron are produced if 25.0 moles of hematite react with 30.0 moles of carbon monoxide?
Calculate the moles of H2 present in this gas sample. . 9. 1.0 gram of water at 25 C is heated to 100 C, at which point it boils at an atmospheric pressure of 1 atm and is vaporized.
A 10.00 mL sample of this stock solution is added to 59.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.
A 355 ml container holds .146g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 26 mmHg. Calculate the moles of Argon present.
What key metabolic substance is formed directly from catabolism of all three major classes of foods (carbohydrates, lipids, and proteins)?
At constant pressure, in which of the reactions is work done by the system on the surroundings? By the surroundings on the system? In which of them is no work done?
A sample of gas with a mass of 1.80 g occupies a volume of 921 mL at a pressure of 733 torr and a temperature of 24 C. What is the molar mass of the gas?
CH3 H Cl Draw the two stereoisomeric Markovnikov addition products of this reaction. Are both products chiral? Explain. Will the reaction mixture rotate plane polarized light? What is the stereochemic
This mixture is also heated to 350 C. After equilibrium is reached will there be any difference in the composition of the mixtures in the two flasks?
Calculate the solubility of potassium bromide at 23 degrees celuius.assume that the solubility increases by an equal amount for each degree between 20 and30 degrees