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1) The nonvolatile, nonelectrolyte estrogen (estradiol), C18H24O2 (272.4 g/mol), is soluble in ethanol, CH3CH2OH.
Calculate the osmotic pressure (in atm) generated when 13.2 grams of estrogen are dissolved in 263 mL of a ethanol solution at 298 K.
________ atm
2) The ionic compound Na2Cr2O7 is soluble in water. Calculate the osmotic pressure (in atm) generated when 17.5 grams of sodium dichromate are dissolved in 87.4 mL of an aqueous solution at 298 K. The van't Hoff factor for Na2Cr2O7 in this solution is 2.54.
_________ atm
3) In a laboratory experiment, a student found that a 112-mL aqueous solution containing 2.379 g of a compound had an osmotic pressure of 31.3 mm Hg at 298 K. The compound was also found to be nonvolatile and a nonelectrolyte. What is the molar mass of this compound?
__________g/mol
Question- A newspaper reported that the levels of chloroform in the drinking water was measured at 1.7*10^4 ppm. the sample of water that was tested weighed was 9.30 grams. is this a true statement the solublity of the chloroform
How many moles of HCl must be added to 1.0 L of 1.0 M NH3(aq) to make a buffer with a pH of 9.00? (pKa of NH4^+ = 9.25)
According to the valence bond theory, which of the following molecules involves sp2 hybridization of orbitals on the central atom?
A person receives 50 mrad of gamma radiation. Explain what is that amount in grays. Define what would be the equivalents does in millirems
The unimolecular decomposition of N2O5 has an activation energy of 102 kJ/mol and H= + 55 kJ/mol. Explain what is the activation energy for the reverse reaction?
protons are not evenly distributed throughout an atom
An aqueous solution containing 21.6 mg of vasopressin in 100.0 mL of solution has an osmotic pressure at 25.0 oC of 3.70 mmHg. What is the molecular weight of the hormone?
Develop a scheme to separate Ag+, Mg2+, and Pb2+ cations in solution and draw a flow chart that depicts your scheme.
Three moles of C(s) are heated from 300K to 600 K at constant P. Over the temperature range, Cp = -12.19 + 0.1126 T/K - 1.947 x 10-4 T^2/K^2. Find delta H and delta S.
Utilizing the periodic table arrange the atoms in each of the subsequent sets in order of increasing electronegativity.
A certain compound is a white solid with a melting point of about 780 deg C. When it melts it conducts electricity.a) What type of solid is this?b) In which solvent is it likely to be more soluble, water or CCl4. Explain.
if someone ate 6259 ml of snow how much water would they have consumed? how many kj would be required to bring it to
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