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At 90 oC, the vapor pressures of benzene and toluene are, respectively, 1010 and 405 mm Hg. Calculate the vapor pressure of a solution of 20 g of benzene (C6H6) and 20 g of toluene (C7H8) at 90 oC. Is the boiling point of this mixture higher or lower than 90 oC at an atmospheric pressure of 1 atm? Show your work for full credit.
A solution contains 1.35 g of Ca(OH)2 in 875 mL of solution. Find the normality of the solution.
A solution is prepared by adding 60.0 mL of 0.060 M HBr to 180.0 mL of 0.70 M HI. Calculate the concentrations of all species in this solution. HBr and HI are both considered strong acids
Which of the following elements will have the same number of core electrons as P?
Acetaldehyde decomposes at 750 K: CH3CHO â†' CO + CH4. The reaction is first order in acetaldehyde and the half-life of the reaction is found to be 530 seconds. What is the rate constant for the reaction at this temperature?
explain the main concept behind the VSEPR theory of molecular shape. how do both number and type of electron pairs influence the shape of a molecule?
Draw the 3-dimensional structural formula for ® 2 -iodopentane. Use the wedge and dashed line convention. Complete the table below based on whar you know about enantiomers.
calculate the gasphase proton affinity of NH3. The lattice energy of NH4Cl may be estimated from Kapustinskii's formula using rN-Cl = 3.50 Å.
How many grams of dry NH4Cl need to be added to 1.80 L of a 0.800 solution of ammonia, NH3, to prepare a buffer solution that has a Kb of 8.87? for ammonia is 1.8E-5.
In the decomposition of hydrogen peroxide, the percentage yield of oxygen is 93%. What is the actual yield in grams of oxygen if you start with 100 grams of H2O2.
Calculate the pH at the equivalence point for titrating 0.170 M solutions of each of the following bases with 0.170 M HBr. a)sodium hydroxide
Find the pH at the equivalence point(s) and the volume (mL) of 0.125M HCL needed to reach the point(s) in titrations
4HCl + MnO2 = MnCl2 + 2H2O + Cl2 When 1.22 mol of HCl reacts with excess MnO2, how many moles of Cl2 form?
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