in the reaction BaCI2 (aq) + Na2So4 (aq) BaSO4 (s) + 2NaCI (aq) what phase are the reactants in before reaction? 1.BaCI2 is a solid and Na2SO4 is in aqueous solution 2.both reactants are gases 3.BaCI2 is a liquid and Na2SO4 is a gas 4. Both reactants are in aqueous solution

Modern weaponry has increased the number of deaths in wars and violent conflicts.

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.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)