A student has 4 cards representing elements. The cards were dropped and you have to figure out which ones are the same element. Writing Task:
•What determines the identity of an element
•How the elements are arranged on the periodic table
•Which of the 4 cards represent the same element and how do you know?

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

What is the name of this hydrocarbon?

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.