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A certain volume of a 0.90 M solution contains 4.1 g of a salt. What mass of the salt is present in the same volume of a 2.8 M solution?
Calculate in how many years these signs will have to be replaced. Assume that the end lifetime is when the emission from the tritium is down to only 37% from the initial emission when installed
A mixture of O2, CO2, and N2 has a total pressure of 697. torr. In this mixture the partial pressure of O2 is 143. torr and the partial pressure of CO2 is 197. torr. What is the partial pressure of the N2 (in torr)?
Trichlorofluoromethane (CCl3F) boils are 23.8C and its molar heat of vaporization is 24.8 kj/mol. Calculate the molar entropy of evaporation of CC3F (l)
A 460 mL sample of oxygen (O2) was collected by displacement of water at 24 ? C under a total barometric pressure of 1095 torr. What mass of dry oxygen was collected? The vapor pressure of water at 24 ? C is 22 torr
Moles of carbonate in limestone? 2. % CaCo3 in limestone (Equation 2)?
choose the correct answer for the atom using the periodic chart. Larger atomic or ionic radius, F or F(-)
Compute the difference in pressure between CH4 and an ideal gas if 14.0 moles of gas are in a 6.00 litres tank at the temperature of 21.1 degree celsius . The van der Waals constants for CH4 are a =2.300 L^2 x atm/mol ^2 and b=0.0430 L/mol.
Write the chemical equations representing the first, second, and third acid dissociations. 100mL 0.050 M phosphoric acid is titrated with 0.10 M NaOH. Calculate the pH of the solution after 25mL of NaOH have been added.
A solution is made by dissolving 0.679 mol of nonelectrolyte solute in 871 g of benzene. Calculate the freezing point and boiling point of the solution.
Calculated the volume of 1 M solution of HCl needed for 1 unit shift of the pH of the following solutions
What is the solubility of BaF2 (Ksp = 1.8x10-7) in pure water in grams per liter? The molecular weight of BaF2 is 175.
To extract Al from glass, 200 mL of EDTA were mixed with .50g of glass particles and allowed to equilibrate over time. The Al concentration of the solution was found to be 5.25 mcM. If the glass contained .40 wt% Al, what percent of Al was extract..
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