1. the periodic table is based on an element's a. molecular size. b. molecular mass. c. atomic mass. d. atomic number.
2. one atom of silicon can properly be combined in a compound with a. two atoms of oxygen. b. one atom of chlorine. c. three atoms of hydrogen. d. four atoms of calcium.
Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3
Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.