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When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0g/mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.258 degrees C.
Calculate Ka for the unknown weak acid.
Propose the kinds of attractive forces that might bind congo red to cotton fabric.
Determine the enthalpy for the given reaction as CS2
The reactant concentration in a first-order reaction was 6.80×10-2 M after 10.0 s and 4.40×10-3 M after 65.0s . What is the rate constant for this reaction?
A voltaic cell consists of a Mn/Mn2+ electrode (E°= -1.18 V) and a Fe/Fe2+ electrode (E°= -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.
The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust and other resources is about 26 million tons. the equation for the reaction is S + O2= SO2.
Provide some diagnostically useful differences you would expect in the IR spectra between starting materials and product for the reaction you carried out (e.g. if I was asked this regarding the oxidation of cyclohexanol to cyclohexanone
These two substances reach thermal equilibrium at a temperature of 64.2 degree celsius. If the specific heat capacity of substance "B" is 1.17 J / g-C, what is the specific heat of substance "A". (assume no heat is lost to the surroundings)
What is the heat change in J associated with 37 g of gaseous methanol at 89 oC changing to liquid at -64 oC?
Radioactive isotopes often occur together in mixtures. Suppose a 190 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days. If there are initially twice as many calcium atoms as there are barium atoms, what will be the ..
a mixture with 75% R and 25% S has an optical rotation of -30. what is the optical rotation of pure R?
What is the principle quantum number for the inner transition metals? (the atomic numbers are 57 through 102, called the lanthanide series
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
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