Base is added to a solution containing Ca+2, Na+ and K+ and a precipitate forms. What is the chemical formula of the precipitate? (use parentheses where appropriate and regular sized text as sub- and super-scripts; e. g. Al2(SO4)3 would be written Al2(SO4)3)

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.