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In a miniscale distillation, the top of the mercury bulb of the thermometer placed at the head of a distillation apparatus should be adjacent to the exit opening to the condenser. Explain the effect on the observed temperature reading if the bulb is placed below the opening to the condenser
What molar ratio of acetic acid to sodium acetate is required to create a buffer solution having a pH of 4.84 at 25°C? Ka for HC2H3O2 is 1.8 × 10-5.
Name the stereoisomers formed by oxidation of (S)-4-methylcyclohexene with osmium tetroxide.
Desalination of brackish water is achieved by evaporation. A fraction of feed water is sent through an evaporator and the other is bypassed. The fraction bypassed and the pure water leaving the evaporator are mixed together to give the desalinasie..
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
The HCl molecule is quite well described by the morse potential with hcDe=5.33 ev. v=2989.7 and xv+52.05 . Assuming that the potential is unchanged on deuteration , predict the dissociation energy of HCl and DCl
Explain the fact that even though dibenzoylmethane (C6H5COCH2COC6H5) is not a methyl ketone, it gives a positive iodoform test when treated with the NaOH and I2.
Synthesis gas can be made by reacting red-hot coal with steam. Estimate the temperature at which the equilibrium constant for the reaction is equal to 1.
calculate the ratio of dissolved benzoic acid to benzoate ion at equilibrium. Ka for enzoic acid is 6.46 X 10^-5
What mass of this substance must evaporate in order to freeze 230 of water initially at 24? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
What ions will the following elements form? Enter the letter of the item in Column Two that best matches the item in Column One.
To cool a volume of water from 176° K to 100° K, 7.9 x 104 J of heat energy must be removed. What is the volume of water that was cooled?
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