Describe how you would prepare a 50.0 mL solution of 4.00 M K2SO4. Calculate the volume of 4.00 M K2SO4 that is needed to prepare 600. mL of a 0.0200 M solution of K2SO4. Calculate the molar concentration of K+ ions in the 0.0200 M solution.

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?