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A compound has the empirical formula CH2O. When 0.0866 g is dissolved in 1.000 g of ether, the solution's boiling point is 36.5°C. Determine the molecular formula of this substance.
at 25c the standard enthalpy of formation of HF(aq) is -320.1 kj/mol. of OH(aq) it is -229.5Kj/mol. of F (aq) it is -329.5 Kj/mol.of H2O(l) it is -286.1Kj/mol.
A stream of humid air containing 1.00 mole% H2O(v) and the balance dry air is to be humidified to a water content of 10.0 mole% H2O. For this purpose, liquid water is fed through a flow meter and evaporated into the air stream. The flow meter, R, ..
From the composition of lignite coal, calculate the mass of sulfuric acid that could potentially form as acid rain from burning
If 25 ml of solution A is needed to make a 0.7 liters with a final concentration of 1.5%, what was the concentration percentage of the stock solution
The dialyzing bag is then immersed in distilled water. Which of the following actions should be taken to remove the most salt from the mixture? Leave the bag in the distilled water for an extended period of time, Replace the dialyzing bag periodic..
The initial rate of a reaction which is first order in A is 2.0 x 10^-6 M/s when the initial concentration is 0.0050 M. What is the first order rate constant
a bottle containing 315 g of cleaning solution is used for carpets. if the cleaning solution has a specific gravity of
how do you find delta change H° of gaseous HCl with the following information: 1) N2(g) + 3H2 (g) > 2NH3(g) delta changeH°(rxn) = -91.8 kj 2) N2(g) + 4H2 (g) +Cl2 (g) > 2NH4Cl(s) detla changeH°(rxn)= -628.8 kj 3) NH3 (g) +HCl (g) >NH4Cl(s) delta c..
show an example of your Ka or Kb calculation for NaC2H3O2 given that the measured pH is 7.20 and the [H+] is 6.3 x 10^-3
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first ..
at 80 deg c the vapor pressures of pure liquids x y z are 385 190 66 mm hg respectively. what pressure must be exerted
At its boiling point, the vaporization of 0.579 mol CH4 requires 4.76 kJ of heat. What is the enthalpy of vaporizating of methane?
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