Iron pyrite (FeS2) is the form in which much of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce

Question

iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial
contributor to acid rain. What mass of Fe2O3 is produced from 71 L of oxygen at 3.72 atm and 158 degrees C with an excess of iron pyrite?
Answer in units of g

Answer 1

Here is the formula for solving theser stoichiometry problems.
1. Write the equation and balance it.
2. Convert what you have into mols. mols = grams/molar mass.
3. Using the coefficients in the balanced equation, convert mols of what you have (from step 2) to mols of the product.
4. Now convert mols of the product to grams. g = mols x molar mass.

Answer 2

Deez nutz in your mouth