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n-Butanol (C4H9OH) undergoes complete combustion to form CO2(g) and H2O(l). The enthalpy of combustion of n-Butanol, and the enthalpies of formation of CO2(g) and H2O(l), are shown below. Use the information given to calculate the enthalpy of formation of n-Butanol
Two compounds have the same empirical formula. One substance is a gas, the other is a viscous liquid. How is it possible for two substances with the same empirical formula to have markedly different properties?
a flask containing gaseous n2 is irradiated with 25 nm light. the irradiated moleculars of n2 can absorb the energy
A solution is made by dissolving 4.055 g of FeCl3 in 500 mL of water. The freezing point of this solution is -.316 C. What is the van Hoff factor (i) for FeCl3 at this concentration? (kf for water is 1.86 C/m)
If 29.58 mL of 0.550 M NaOH is required to titrate the oxalic acid in the 0.554g sample to the equivalence point, what is the weight percent of oxalic acid in the mixture. Oxalic acid and NaOH react according to the equation H2C2O4 (aq) + 2 NaOH(a..
Describe the difference between the following and list any particular advantage possessed by one over the other a) filters and monochromators as wavelength selectors
There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature. Express your answer in J. Heat capacity for Helium = 20.8 J/(mol K) Molecular weight for Helium = ..
What is the molecular geometry of Cl2CO?
Determine the molar absorptivity of the acidic form of bromocresol green at 445 nm and at 615 nm. Given: Stock soln of bromoscresol green= 80.0 mg/L Molar Mass= 698.0 g/mol ?(445nm)=A445/[BG]
Calculate the amount of energy needed in calories to heat 145 g of water from 22.3 degrees celsius to 75.0 degrees celsius. (water in j/g degree celsius = 4.184, cal/ g degree celsius = 1)
Why is there a difference between the conduction of glacial acetic acid (CH3COOH) and 0.1 M Acetic acid (CH3COOH)? Please explain in detail.
Benzene is evaporated into a room at 1 gram per minute the room is 6 by 6 by 3 meters and has a ventialtion rate of 10 meters cubed per minute what is the steady state concentration of benzene in the room
explain the biochemical changes that takes place during the investment phase of glycolysis
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