What is the freezing point in the given solutions
What is the freezing point in (C) the solutions below? For water, Kf=1.86 (Ckg)/mol. The vapor pressure of water at 45.0 C is 71.93mm Hg.
1. A solution of 12.5 g of urea, CH4N2O, in 135 g of water at 45 C.
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Calculate the oxidation number of each element in the reactants and products. Identify the oxidizing agent and reducing agent based on the change in the oxidation number.
Compare and contrast these methods of extraction- Solid phase extraction, liquid liquid extraction, Supercritical fluid extraction, Derivatization, and solid-phase microextraction
Gallium has an average atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exists as Ga-69 (68.9257 amu). What is the identity and the atomic mass of the other isotope?
What volume (L) of 0.378 M potassium hydroxide solution would just neutralize 80.3 ml of 0.165 M H2SO4 solution
At 5 oC the equilibrium constant for the reaction: 2 HBr(g) H2(g) + Br2(g) is KP = 2.80e-16. If the initial pressure of HBr is 0.00991 atm, what are the equilibrium partial pressures of HBr, H2, and Br2? p(HBr) = . p(H2) = . p(Br2) =
A cargo plane traveling towards a positive x-direction at an elevation of 60 m drops a package to a certain village. At what horizontal distance from the village should the package be dropped?
At 900K the following reaction has Kp=0.345. 2SO2 + O2->2SO3. In an equilibruim mixture the partial pressure of SO2 and O2 are 0.145 atm and 0.445 atm respectively. What is the equilibruim partial pressure of SO3 in the mixture?
Calculate the equilibrium constants of the dissociation and the standard enthalpy of dissociation at the mean temperature.
In the coordination compound K2[Co(en)Cl4] the coordination number (C.N.) and oxidation number (O.N.) of Cobalt are C.N. = 6; O.N. = +2. C.N. = 6; O.N. = +3. C.N. = 5; O.N. = +2. C.N. = 5; O.N. = +4. C.N. = 4; O.N. = +3.
Iron (III) oxide reacts with carbon to give iron and carbon monoxide. How many grams of C are required to react with 80.0g of Fe2O3?
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