SUMMARY
The discussion focuses on calculating the percentage by mass of phosphorus in a fertilizer containing 30.0% phosphorus pentoxide (P2O5). The correct calculation involves determining the mass percentage of phosphorus (P) in P2O5, which is 45.9%. However, since the fertilizer contains 30% P2O5, the final percentage by mass of phosphorus in the fertilizer is calculated as 45.9% of 30%, resulting in a value of 13.1%. The correct answer is option B, 13.1%.
PREREQUISITES
- Understanding of chemical formulas, specifically P2O5.
- Basic knowledge of percentage calculations.
- Familiarity with mass percentage concepts in chemistry.
- Ability to perform unit conversions and dimensional analysis.
NEXT STEPS
- Study the composition and properties of phosphorus pentoxide (P2O5).
- Learn how to calculate mass percentages in chemical compounds.
- Explore the significance of phosphorus in fertilizers and its impact on plant growth.
- Review common chemical equations and their applications in agricultural chemistry.
USEFUL FOR
Students preparing for AS level chemistry exams, educators teaching chemical calculations, and individuals interested in understanding fertilizer composition and its implications for agriculture.