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Explain why does the introduction of a solute into a solution change the freezing point? Explain how does the freezing point change?
A 0.2254 g sample of naphthalene (C8H10, 128.16 g/mol) was burned in a bomb calorimeter with a heat capacity of 2.18 kJ/K, and the temperature increased by 4.16°C. What is the molar enthalpy of combustion for this compound
If a solute interacts strongly with the stationary phase what practical implication might this have
Zn is immersed in a solution of CuCl2. What is the reaction and at what activity ratio of Zn(2+) / Cu (2+) will the reaction stop
a researcher has a 500.0 ml solution that is 0.322 m in hg2no32 and 0.0104 m in pbno32. she plans to add solid
The radioisotope 224Ra decays by a emission primarily to the ground state of 220Rn (94% probability) and to the first excited state 0.241 MeV above the ground state (5.5% probability). What are the energies of the two associated a particles
How many grams of oxygen gas are required to produce 7.68 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water?
When photons with a wavelength of 310. nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 × 105 m/s.
a common rule of thumb taught to engineers inthe recent past was that raising the temperature 10cfor many reactions
Explain the half-life of tritium (hydrogen-3) is 12.3 yr. If 61.6 mg of tritium is out from a nuclear power plant during the course of an accident, explain what mass of this nuclide will remain after 12.3 yr
raising the total pressure from P0 (the initial air pressure) to P1 (the total final pressure of H2(g) + air).Compose an algebraic expression for the volume (V2) that this sample of H2(g) would occupy if it were isolated
a 0.525-g sample of a compound is dissolved in enough water to form 100.0 ml of solution. this solution has an osmotic
Hydrolysis of an ester using sodium hydroxide (2M) is usually a fast reaction. Why would it take almost 40 minutes to complete? It is imperative to consider the location of each reagent within the vial.
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