What is the meaning of a value of –400 kj in a reaction? the reaction requires 400 kj of heat. the reaction releases 400 kj of heat. the products have 400 kj of heat energy more than the reactants. the reaction will not occur.

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.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate