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Calculate the pH of Benzoic acid if 0.0458 M is dissolved in water ( Ka = 6.40 x 10^-5) C6H5CO2H + H2O = (H3O+) + C6H5CO2 ^-1
What is the Kb for the above conjugate base (C6H5CO2^-1) that produces OH^-1 in water? C6H5CO2^-1 + H2O = C6H5CO2H + OH^-1
When gasoline burns, it reacts with oxygen in the air and forms hot gases consisting of carbon dioxide and water vapor. How does the potential energy of the gasoline and oxygen compare with the potential energy of the carbon dioxide and water vapo..
Copper has two isotopes: Cu-63 (abundance = 69.2%, mass = 62.930 amu) and Cu-65 (abundance = 30.8%, mass = 64.928 amu). Calculate the (average) atomic mass of copper.
Which of the following strong electrolytic solutions will have the highest electrical conductivity?
A reaction with a low enthalpy of reaction value is not spontaneous at low temperature but becomes spontaneous at high temperature.
how much energy would be required to raise the temperature of 75.0 g of water from 25 c to 75 c
A steel cylinder contains 120. moles of nitrogen gas at a temperature of 32 C and pressure of 775 torr. After some of the nitrogen gas has been used,
Suppose in the lab you measure 0.3951 g of NaOH and dissolve it into 100.0 mL of water. You then measure 0.1985 g of KHP and place it in a clean, dry 100-mL beaker, and then dissolve the KHP in about 25 mL of water and add a couple of drops of phe..
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
The molecular weight of vincristine, a pharmaceutical drug, is 923.04. It is supplied in 1 mg per vial. You want to treat your culture cells with a final concentration of 5 hM vincristine and will need 30 ml of cells for your experiment
What mass of water can be heated from 22?C to 100 ? C by burning this piece of coal? Answer in units of g
how many moles of ethylene glycol should be added to the radiator to lower the freezing point of the water from 0 degrees celcius to -18 degrees celcius?
The element copper has an atomic weight of 63.5 and consists of two stable isotopes copper-63 and copper-65. The isotope copper-63 has an atomic mass of 62.9 amu and a percent natural abundance of 69.1 %.
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