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Calculate the freezing point and boiling point of a solution containing 12.4 g of naphthalene (C10H8) in 103.0 mL of benzene. Benzene has a density of 0.877 g/cm3. Calculate the freezing point of a solution. (Kf(benzene)=5.12°C/m.). Calculate the boiling point of a solution. (Kb(benzene)=2.53°C/m .)
Make three-dimensional drawings of the following molecules, and predict whether each has a dipole moment. If you expect a dipole moment, show its direction. c) CH2Cl2 d) H2Cdouble bonded to CCl2
suppose the absorbance of an iodine sample changes from 0.6 to 0.7when the iodine concentration in it is increased from
What is the pH when 100 mL of 0.1 M HCl is titrated with 50 mL of 0.2 M NaOH?
A special mud formed by mixing dry clay and water is used to assist drilling through rock. The optimum amount of day in the mud is determined from a chart.
A friend studies a first-order reaction and obtains the following three graphs for experiments done at two different temperatures. Which two graphs represent experiments done at the same temperature? What accounts for the difference in these two gr..
Determine the heat of combustion per gram of octane and the heat of combustion per mole of octane?
a 175.0g sample of a compound contains 56.15g C, 9.43g H, 74.81g O, 13.11g N, and 21.49g Na. What is the compound's empirical formula?
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume of 1.00 liter and contain
a compound contains only c h and o. to analyze the compound you determine its empirical formula by analysis for c and h
How many milliliters of ethanol are present if a sample contains 5.60 *10100molecules at 20 oC
Calculate the osmolarity of this solution. my answer is 0.499 osm. Is that correct? 2*(.1249) + 1 (.2499)
For HCl represented as a harmonic oscillator, it has a vibrational frequency of 2885 cm-1. The vibrational frequency of DCl (where D is twice the mass of H) should be (assuming HCl and DCl have the same force constant):
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