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A flask with stopper has a mass of 79.310g. A 25.0 ml sample of an unknown organic liquid was pipeyyed into the flask and gave a total mass of 97.010g. Find the density of the unknown liquid.
What is the mole fraction of ethanol in this solution. Sdduming ideal-solution behavior, what is the vapor pressure of the solution at 63.5 C. What is the mole fraction of ethanol in the vapor above the solution
The freezing point of a solution of 1.048 g of an unknown nonelectrolyte dissolved in 36.21 g of benzene is 1.39°C. Pure benzene freezes at 5.48°C and its Kf value is 5.12°C/m. What is the molecular weight of the compound?
Compare the pH vs volume curve for HCL and acetic acid. discuss any difference in the shape of the curves. Compare theese two curves to one of the curves prepared for the unknow
How many electrons are there in the pi antibonding orbitals of the (N2)+, (C2)2+, (Br2)2+ and (O2)+ cations
an ideal gas at 25 ºC and 5 bar are expanded to a final pressure of 1.00 bar. Assuming Cv=3/2 R, calculate deltaU, deltaH, q, w, and DS if the process is
A solution is made by mixing equal masses of methanol, CH4O, and ethanol, C2H6O. Determine the mole fraction of each component to at least three significant figures.
In the conversion of glucose to pyruvate, how many of the actual steps involve electron transfer
The reactant concentration in a zero-order reaction was 9.00×10^-2 M after 100s and 2.50×10^-2 M after 390s . What is the rate constant for this reaction
The Ka for boric acid is 7.3 x 10-10. What is the pKa of boric acid?
how many grams of zinc must react with sulfuric acid in order to obtain 500mL of hydrogen at 20 deg c and 770 mm hg?
How many oxygen atoms are there in 52.06 g of carbon dioxide. How many O atoms does each carbon dioxide molecule contain.
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 8.44
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