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When 0.250 grams of a polymer were dissolved in 22.9 mL of benzene at 21.6 degrees C, the osmotic pressure was found to be 0.044 atm. Calculate the molar mass of the protein.
a boy use a metalnbsp that was heat up in hot h2o and then put into a styrofoam cup of h2o at room temperature.
An unknown monoprotic weak acid, HA, has a molar mass of 55.0. A solution contains 2.50 g of HA dissolved 800. mL of solution. The solution has a pH of 2.000. What is the value of Ka for HA
A gas filled balloon with a volume of 12.5 L at 0.90 atm and 294 K is allowed to rise to the stratosphere where the temperature is 268 K and the pressure is 1.0 millibar. What is the final volume of the balloon ? (1.0 atm = 1.013 bar).
Classify each of the reactions in problem 4 as an oxidation-reduction, substitution, addition, or esterfication reaction. Write an equation for the synthesis of
which of the compounds of H2C204, Ca(OH)2, KOH, and HI behave as acids when they are dissolved in water
The temperature of a 15g sample of lead metal increases from 22oC to 37oC upon the addition of 29.0 J of heat. The specific heat capactiy of the lead is jg*K
Is it theoretically possicle to separate 99.99% of 0.10M KI from 0.10M KBr by controlled-potential electrolysis
Derive an expression for the force constant of an oscillator that can be modelled by a Morse potential using equation 12.37 which states
Equal volumes of 0.180 M weak base (Kb=2.5x10^-9) and 0.180 M HCl are mixed. Calculate the pH of the resulting solution.
Prepare a molecular orbital energy level diagram for NO, showing clearly how the atomic orbitals interact to form MO's b) How does the diagram illustrate the difference in electronegativity between N and O
A solution is prepared by dissolving 6.00g of unknown nonelectrolyte in enough water to make 1.00L of solution. the osmotic pressure of this solution is 0.750 atm at 25.0 C. what is the molecular weight of the unknown solute ( R= 0.0821 L.atm/K.mo..
A solution contains Cr3+ ion and Mg2+ ion. The addition of 1.00 L of 1.55M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 50.2g.
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