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An aqueous solution is prepared from 40.0 g of lithium fluoride "LiF" (a nonvolatile ionizable electrolyte) in 200.0 g of water. Given Kb water = 0.52oC/m and the van't Hoff factor of this lithium fluoride solution = 1.20, the boiling point elevation of this solution (in oC) is: A) 5.2 B) 4.8 C) 4.4 D) 4.2
A solution is 89.8% by volume benzene(C6H6) in carbon tetrachloride at 20 degrees C. The vapor pressure of pure benzene at this temperature is 74.61 mmHg and it's density is 0.87865 g/cm^3;
tripling the concentration of A increases the rate by a factor of 27, doubling the concentration of B has no effect on the rate, and tripling the concentration of C increases the rate by a factor of 3. Write down the rate law for this reaction.
An ideal gas at 300K has an initial pressure of 15 bar and is allowed to expand isothermally to a pressure of 1 bar. Calculate the maximum work that can be obtained from the expansion
A student standardizes his NaOH titrant solution with KHP. He performs three titrations - in each trial, the mass of KHP (204.22 g/mol) used is 1.500 g. The average amount of NaOH used in the standardization is 29.3 mL +/- 0.06 mL.
Using words and pictures, explain why impurities usually lower the melting point of a substance. Next, imagine a case where an impurity actually RAISES the melting temperature of a pure substance
Calculate the downward pressure in pascals due to gravity exerted by the bottom face of a 3.25kg cube of iron that is 7.50 cm
A heat exchanger is used to transfer heat from a steam stream to a chlorine gas stream. 100 kg of steam at 1 bar and 400°C enters the heat exchanger and leaves the exchanger as saturated steam at 1 bar. Chlorine gas enters the exchanger at 1 bar a..
How many grams of Mg2SO4 is required to make up 100mL of 20g/L Mg2SO4 solution in water?
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate
What are the advantages and disadvantages of Lewis, condensed, and line-angle structural formulas
Write the electron configurations for the following ions. You should use the noble gas abbreviations: Te2-, Mg+, As+, I-, Fe3+, N3-, Sn4+, Tl4+
The composition of a gas on a dry basis is 74.0 mole% N2, 10.0% O2, 12.0% CO2, and 4.0% CO. If the mole fraction of water is 0.190, what is the gas composition on a wet basis
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