The heads of matches are made with P4S3. this material is made by heating a mixture of red phosphorus and sulfur:

Question

8P4 + 3S8----> 8P4S3
If a match company uses 5435 grams of phosphorous (p4) with an excess of sulfure, how many grams of P4S3 can be made?

Answer 1

1. Convert 5435 g P4 to mols. Remember mols = g/molar mass.
2. Using the coefficients in the balanced equation, convert mols P4 to mols of the product.
3. Now convert mols of the product to grams. Remember g = mols x molar mass.