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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Although pyrrole is a much weaker base than most other amines, it is a much stronger acid (pKa ≈ 15 for the pyrrole versus 35 for diethyl amine). The N-H proton is readily abstracted by base to yield the pyrrole anion, C4H4N. Explain.
The reaction will become more spontaneous. B) The spontaneity of the reaction will not change. C) The reaction will become less spontaneous. D) ?G will decrease. E) K will decrease.
An iron meteorite was analyzed for isotopic Argon Content. the amount of 36Ar was 0.200mm3 (STP)per kg of meteorite in each 36Ar atom had been formed by a single cosmic event, how many such events must have been occurring per kg of meteorite?
A second order reaction of the type A + B--> P was carried out in a solution that was initially .075 mol dm^-3 in A and .050 mol dm^-3 in B. After 1.0 h the concentration of A had fallen to .020mol dm^-3 a)Calculate the rate constant b)What is
In the following chemical equation, what is the reactant. CuSO4·5H2O(s) ® CuO(s) + SO3(g) + 5H2O(l)
Which of the following is true about the photoelectric effect. a) The number of electrons emitted increases with intensity of light, regardless of the frequency. b) The number of electrons emitted increases with the intensity of light
Using values from Appendix C of your textbook, calculate the value of Keq at 298 K for each of the following reactions: (a) CH4(g) + 4 Cl2(g) CCl4(l) + 4 HCl(g) Keq = . (b) H2(g) + Br2(g) 2 HBr(g) Keq = . (c) Fe3O4(s) + 4 CO(g) 3 Fe(s) + 4 CO2(g)
In a solution of NH3, the concentration of NH3 is 0.01 M, Kb is 1.8 x 10-5. What is the concentration of the hydroxide ion
Calculate ?G (in kJ) at 65 oC for the reaction- N2O(0.0024 atm) + H2(0.24 atm) ? N2(846.0 atm) +H2O(l)
A single beam photometer with a linear response showed a detector signal of 73.6 uA for a blank solution. Replacing the blank with the sample solution yielded a signal of 24.9 uA. What is the transmittance expected for a sample solution of twice t
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