54 points the solubility of sodium chloride is 35.9 g/100 g h2o at 20°c. 35.9 g of sodium chloride are added to 100 g of water, and all of it dissolves. another solution is made from the same amount of salt and the same amount of water. this time some solid remains undissolved. what factor could cause the difference? volume temperature beaker size solute purity

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.