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Three solutions are mixed to form a single solution. One contains 0.2 mol Pb(C2H3O2)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2.
Write net ionic equations for precipitation reaction(s) that occur.
Determine the ion notation for an atom with 18 electrons and 20 protons
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
When electrical current of unknown magnitude is run through the device for 4.00min , 13.1mL of water-saturated H2(g) is collected. The temperature and pressure of the system are 25C and 715torr. A. How many moles of hydrogen gas are produced
In a graph(Energy (kj/mol)) the first five ionization energies of an atom are IE1, IE2, IE3, IE4, and IE5. what is the element symbol and its complete electron configuration for
Concentrated HCl was added to a Ca(OH)2 suspension (in water) and the precipitate dissolved. Explain this observation on the basis of a Le Chatelier's shift in the equilibrium.
if 860 liters of neon at 45°C and 800 mm. are decreased to 700 liters at the same pressure, what is the new temperature of this gas?
Bombardment of nitrogen-14 with an alpha particle produces a proton and what other radioactive isotope
The zinc content of a 1.23 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH. Zn+2HCl-->ZnCl2+H2
What is the molar mass of the acid? If the unknown acid had the formula H2X, could this experiment be used to determine its molar mass? Explain why or why not
The organic solvent pyridine, C5H5N (aq) is a base with a strong irritating odor. Calculate the pH of a 0.300 M aqueous solution of PYRIDINe at 25 degrees Celcius.
A 3.5 L container is filled with gas at 1.00 atm. A piston then compresses the gas to 0.250 L. What is the new pressure?
During the course of an experiment, a 0.300 M NaCl solution with an initial volume of 25.0 ml is diluted to a total final volume of 26.0 ml. What is the concentration of NaCl in the final solution?
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