The outer shell of this element was determined as illustrated here. It must be a _. : light metal
: heavy metal
: non metal
: noble gas

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa