What is the easiest way to cast a spell effectively!

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Nonpoint source pollution is difficult to control because it

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?