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A 40.2 g sample of protein dissolved in a water to prepare a 250 ml solution shows an osomotic pressure of 2.42 torr at 27 ºC. Estimate the molar mass of the protein.
A sample of hydrogen gas is mixed with oxygen gas. The mixture has a total pressure of 820 torr and the oxygen gas has a partial pressure of 32 torr. What is the partial pressure of the hydrogen gas
Calculate the internal energy change (delta(U)) for vaporization of 100 g of CI2(l) at this temperature and 1 bar? (b) Calculate its molar entropy change (delta(S)) for vaporization at this condition.
boyles law states that when a sample of gas is compressed at a constant temperature the pressure and volume satisfy the
A compound is found to be 30.45% N and 69.55 % O by mass. If 1.63 g of this compound occupy 389 mL at 0.00°C and 775 mm Hg, what is the molecular formula of the compound.
a flask containing gaseous n2 is irradiated with 25 nm light. the irradiated moleculars of n2 can absorb the energy
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O
calculate the change in H, change in G and K (at 298) for the production of ozone from oxygen: 3O2(g) goes to 2O2(g) at 30 km above the surface of the earth the temperature is about 230 K and the partial pressure of oxygen is about 1.0 x 10^-3 atm
The equivalence point is reached when 36 ml of HCl (titrant) is added. What is the pH at the equivalence point? (Kb of NH3 = 1.8 x 10-05) (a) For 36.0 mL of titrant, what is the pH?
While carrying out Part A, some of the solid calcium hydroxide is inadvertently transferred to the beaker and titrated. a. Will more, less, or the same amount of HCl be used for the titration? Explain.
Which of the following atoms has the smallest radius? At, Br, Ge, or Pb? The answer is Ge. Based on trends, wouldn't Br have a smaller atomic radius than Ge
water skier is pulled by a net force of 180 N and has an acceleration of 2.4 m/s2. What is the mass of the skier?
Calculate the volume of 1.00 M nitric acid needed to react completely with 25.0mL of 1.84 M calcium hydroxide
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