1. Write the equation for the decomposition of the hydrate Na2SO4•10H,0. Label the anhydrous salt. 2. A colorless crystalline compound when dissolved in water formed a colorless solution. This compound was heated in a clean, dry test tube. This heating produced several drop- lets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow-brown solution.

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.