Calculate the number of moles in 15.0 g of h2so4..

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

What are the first three quantum numbers for the electrons located in subshell 2s?