A rock sample composed of a compound made of iron and sulfur Has a mass of 125.67g. Analysis of the rock finds 66.98 g of fe, calculate the mass of the sulfur, calculate the percentage of Fe in the sample , what is the percentage of S in the sample

What is the smallest component or the most basic building block of any element ? a. an atom, b. a compound c. gas d. element

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.