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When 2.65g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C. Calculate Ka for the unknown weak acid.
A chemist wants to prepare 0.65 M HCl. Commercial hydrochloric acid is 12.4 M. How many milliliters of the commercial acid does the chemist require to make up 1.48 L of the dilute acid?
State the circumstances under which you would use either a reagent grade chemical or a primary standard.
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C5H12
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87*10^-4/s at 485 C.
graduated cylinder contains 155 of water. A 19.0 piece of iron (density = 7.86 ) and a 18.0 piece of lead are added. What is the new water level in the cylinder?
Distinguishing the given compounds by Infrared spectroscopy, Cyclohexene and 2-hexyne both have the molecular formula C6H10
Calculate the E0 for the following reaction by using the standard reduction potentials data in your lab manual.
The NO molecule has a double degenerate electronic ground state and a double degenerate excited state at 121.1 cm- 1. Calculate and plot the electronic contribution to the molar heat capacity of the molecule up to 500K
What is the maximum amount of Cl2 that can be produced by this reaction. Calculate the amount of excess reactant.
the piston of an internal combustion engine compresses 434 ml of gas. the final pressure is 15 times greater than the
The aluminum and the water are allowed to come to thermal equilibrium. Assuming that no heat is lost, what is the final temperature of the water and aluminum
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