These are to be written but silly old me needs some . the questions are asked in the images. not much in a rush, but if anyone can respond soon that'll be great!

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?