which phrase best describes a scientist? a. a person who is highly educated b. a person who learns about the world by observing it. c. a person who understands how the world behaves. d. a person who is extremely knowledgeable about the world

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.

Which of these conditions most likely produces an unstable isotope?

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry