Which of these events is likely to have caused the mass extinction of the dinosaurs? A. An increase in Earth's overall temperature

B. A large volcanic eruption on nearby islands

C. The fallout of a meteor colliding with Earth's surface

D. Rising sea levels flooding low-lying coastlines

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 the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.