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When a solution freezes, the solid that forms is essentially pure, frozen solvent, without any solute contaminating it. Given this information, why does the freezing point of a solution continue to decrease with time, i.e., the graph has a slope less than zero, rather than stays constant, as in the case of the pure solvent?
if .025 grams of Pb(NO3)2 is dissolved in 100. grams of H2O, what is the concentration of the resulting solution in parts per million?
Calculate the energy that must be removed to convert substance X from a gas at 119°C to a solid -47.9°C.
To produce 225 moles of tetraphosphorus decoxide how many moles of oxygen are required?
Classify the following elements as main group elements, transition metals, or inner transition metals: Fe, Ba, U, Pb, Pd, S
Trichloroacetic acid (CCl3CO2H) is a corrosive acid that is used to precipitate proteins. The pH of a 0.050 M solution of trichloroacetic acid is the same as the pH
In vibrational motion of HI (g), the iodine atom essentially remains stationary because of its relatively large mass. Assume that the hydrogen atom undergoes harmonic motion and that the force constant is 313.8 N/m
In solid nickel the atoms are so tightly packed they touch each other. Using geometry and the equation 4r = a(2)1/2 and a = 3.524 calculate the value for r, the radius of a nickel atom.
In the reaction below, 4.86 atm each of H2 and Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) 2 HCl(g) Given that Kc = 89.9, calculate the equilibrium pressure of HCl.
The calorimeter constant is 27.8J/°C. Write the balanced chemical equation and calculate the amount of heat released by the experiment
Ascorbic acid (vitamin C, C6H8O6) is a diprotic acid (Ka1 = 8.00x10^-5 and Ka2 = 1.60x10^-12). What is the pH of a 0.280 M solution of ascorbic acid
For the compound MX, Ksp is 2.00 × 10-11. The anion X- forms the weak acid HX (Ka = 1.8 × 10-5). Calculate the solubility of MX in 10.00 M strong acid.
Two of these students will report, within experimental error, the same increase in solution temperature for the neutralization. Which are the two students? Explain.
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