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a fan is connected to a battery in a series circuit. what kind of energy transfer occurs if the circuit is closed?
a
light energy changes to chemical energy
thermal energy changes to mechanical energy
chemical energy changes to mechanical energy!
d)
mechanical energy changes to chemical energy
!

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

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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.