Asolute crystal is dropped into a solution containing dissolved solute. it falls to the bottom of the beaker and does not dissolve after vigorous stirring. what does this indicate about the solution?

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.

State one important difference between a physical change and a chemical change?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?