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When 0.512 grams of a substance is dissolved in 7.03 grams of naphthalene, the solution has a freezing point of 75 degrees celcius. What is the molar mass of the substance? Kfp for naphthalene is 6.80 degrees celcius/kg/mole.
What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
The concentration of a commercially available concentrated nitric acid is 70.0 percent by mass, or 15.9 M. In 100 grams of solution there are 1.11 mol of HNO3. Calculate the VOLUME of 100 grams of the solution
What volume of a 0.1 M ClO- solution reacts stoichiometrically with a 10 mL solution of 0.2 M CrO2-? Use the reaction 2 CrO2- + 3 ClO- --> 2 CrO4-2 + 3 Cl- to assist in the calculation.
Explain why the bond dissociation energy for the C-C sigma bond in propane is lower than the BDE for the C-C bond in propene.
Using a planar pentagon representation for the cyclopentane ring, draw structural formula for cis-2-methylcyclopentanamine. Make use of the solid and hashed wedge bond
Draw a molecular orbital picture for the pi system of each reagent in the [3+2] cycloaddition reaction of ozone with an alkene. Be sure to label the homo and lumo of each.
Iodine-131 is used in the form of sodium iodide to treat thyroid cancer. The isotope has a 1/2 life of 8.05 days
Determine the longest wavelenght of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76*10^3 kJ/mol.
The theoretical yeild of Ni(NH3)6Cl2 moles must be calculated as well as the theoretical yield of Ni(NH3)6Cl2 grams. How do you find the limiting reagent to calculate the theoretical yield.
a what temperature change would you expect in which 50.0 ml of 2.0m hcl is combined with 80.0 ml of 2.0 m naoh in
What is the final temperature of the nickel and water? The specific heat is 4.18 J/g * C for water and is 0.444 J/g * C for nickel.
What is the pH of pure water at 40 degrees C if the Kw at this temperature is 2.92 x 10 to the -14th
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