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if a 20 gram sample of a nonelectrolyte is dissolved in 100 g of H2O the resulting solution will freeze at -.93 c (the freezing point constant is 1.86 C/m). On thebasis of these data, one can conclude that the nonelectrolyte has a molecular weight of?
A sample of gas with an initial volume of 33.0 L at a pressure of 765 mmHg and a temperature of 325 K is compressed to a volume of 16.2 L and warmed to a temperature of 440 K. What is the final pressure of the gas?
Explain Solid State Chemistry, 1) Write the balanced chemical equation for Fe2O3+2Al?2Fe+Al2O3 using the lowest possible whole number coefficients.
Calculate the mass of sugar (C12H22O11) that must be dissolved in 700 g of water to prepare 20% sugar solution
How many grams of P2O5 gas are present in a 750 ml container that is at 75 degrees C and at a pressure of 590 mm Hg?
the value of the molar absorptivity is 4.84*10^3 M^-1 cm^-1 for K2CrO4 at that wavelength. what is the concentration of the solution
The rate of decomposition of C3H6 in the following reaction is 0.45 M/s. Calculate the rate of production of H2O. 2 C3H6 + 2 NH3 + 3 O2 → 2 CH2CHCN + 6 H2O
If 8.40 kJ of heat is needed to raise the temperature of a sample of metal from 15 degrees celsius to 20 degrees celsius, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 25 degrees celsius to ..
Aqueous solutions of sodium thiosulfate, Na2SO3, are used as an antidote to some snakebites. How many moles of sodium ions are found in 10.0 mL of a 0.15 M solution of Na2S2O3?
Calculate the percent of a strontium sample left after 100 years. The half-life of strontium-90 is 28.1 years.
The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy
How would you prepare 1.000 L of a 1.000 mole L?1, pH 7.50 Tris-aka, tris(hydroxymethyl)aminomethane-buffer? You have pure Tris?HCl, {(HOCH2)3NH+,Cl?}
When a metal was exposed to light at a frequency of 4.54× 10^15 s-1, electrons were emitted with a kinetic energy of 3.10 × 10^-19 J.
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