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What is the Hvap of a liquid that has a vapor pressure of 616 torr at 84.1 c and a boiling point of 95.5 c at 1 atm? (answer in J/mol)
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
Upon digestion and analysis of DNA sample from animal tissue, there are almost always equal amounts of purines and pyrimidines. Explain why this is so.
The following reaction is endothermic in the forward direction. NH4Cl(s) NH3(g) + HCl(g) For each of the following cases, briefly explain whether the action causes net reaction from left to right, right to left, or no net reaction.
1) Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3
A helium balloon has a volume of 3.50L at 22.0 degrees celsius and 1.14atm . What is its volume if the temperature is increased to 30.0 degrees celsius and the pressure is increased to 1.20atm
what would be a procedure to go by for the reaction of 2 methyl 2 octene with Hbr and what solvents could be used
How much energy is required to vaporize 125g of butane at its boiling point? The heat of vaporization for butane is 23.1kJ/mol.
Equal numbers of moles of toluene and benzene are mixed and form an ideal solution. Compute the mole fraction of benzene in the vapor in equilibrium swith this solution.
How many moles of chlorine molecules correspond to 7.40 x 1026 molecules of Cl2?
The first equivalence point for the titration of 0.2567 grams of a weak acid is reached when a volume of 26.80mL of 0.0510 M NaOH(aq) has been added. What is the molar mass of the acid?
What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
what would the rate constant be at a temperature of 150C for the same reaction described in Part A?
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