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in a strongly acidic solution the amino acid lysine esists as the dication. as the pH is raised, what monocation is formed by the loss of a proton form the dication?
how many moles of NaCl would be made by combining 20,000 moles of Na with 2 moles of Cl
A compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution?
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
Calculate delta S0 for the following processes: a.) Heating 1 mol of benzene(liquid) from 298K to 353 K at 1 bar pressure, neglecting any T- dependence of Cp.
how many liters of H2 would be formed at 528 mm Hg and 12 degrees celcius if 28.0g of zinc was allowed to react
Express the concentration of a 0.0720 M aqueous solution of fluoride, F-, in mass percentage and in parts per million
When Sulfuric acid is a component of polluted air, it chemically attacks statues, memorials, and monuments made from limestone. Given that the most common mineral in limestone is calcium crabonate
A Balloon with a volume of 2.00 L is at a pressure of 1.5 atm and a temperature of 20C. If the balloon is put into a container and the pressure is increased to 2.0 atm and the temperature is raised to 25C, what is the new volume of the balloon?
How fast must a 50.2-g tennis ball travel to have a de Broglie wavelength equal to that of a photon of green light (5400 Å).
Carbon disulfide is a foul-smelling solvent that dissolves sulfur and other nonpolar substances. It can be made by heating sulfur in an atmosphere of methane.
When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.
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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