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A solution is prepared by mixing 50.0 mL of 0.29 M Pb(NO3)2 with 50.0 mL of 1.9 M KCl. Calculate the concentrations of Pb2+ and Cl ? at equilibrium. Ksp for PbCl2(s) is 1.6 x10-5.
Some solid remained in the beaker after stirring with HCl. You washed the filter paper with ketone, which caught on fire and the filter paper was scorched
Specify the volume of mineral water to add to each of the five flasks.
Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.50 that of new wood. How old is the charcoal? (The half life of carbon-14 is 5,730 years.)
what do atoms with a strong attraction for electrons they share with another atom exhibit. What are the formulas for nonpolar covalent compound, polar covalent compound, and ionic compound.
Calculate the pressure of a helium sample at -207.3°C and 768 mL if it exerts a pressure of 175 kPa at 25.0°C and 925 mL
Given the data below for the reaction, 2 A + 2 B + 4 C => D + E + 3 F, Experiment Initial conc of A, mol/L Initial conc of B, mol/L Initial conc of C, mol/L Initial rate, mol/L.s 1 0.1 0.2 0.4 2 x 10-3 2 0.2 0.2 0.4 2 x 10-3 3 0.3 0.4 0.4 4 x 10-3..
Calculate the equilibrium concentrations of CO2, H2, and H2O at 800 K if only CO and H2O are present intially at concentrations of .119M?
The decomposition of hydrogen is a first order reaction with a rate constant of 2.7 x 10^5s^-1 at 25 C. Assuming the initial concentration of H2O2 is 0.75 M. Determine (a) the concentration of H2O2 after 1.5 h, and (b) the time (in h) or the conce..
We want to change the volume of a fixed amount of gas from 725ml to 2.05L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 110kpa
A student makes 215 mL of a 3.15M solution of Na2SO4. he then forgets to seal it and some water evaporates overnight. When he comes back int he morning, the volume of the solution is only 205 mL. What is the molarity of the solution after the wate..
Calculate the mass of TRIS to use when it is mixed with 100 mL of 0.50 M HCl to prepare 1.00 L of buffer of pH=7.40. Also calculate the total concentration of the buffer.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is tripled and that of Br- is tripled? Just put in the number as a whole number or fraction.
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