More Challenging Questions These questions require more thought and integrate several c...

More Challenging Questions

These questions require more thought and integrate several concepts.

The active ingredients in lawn and garden fertilizer are nitrogen, phosphorus, and potassium. Bags of fertilizer usually carry three numbers, as in 5-10-5 fertilizer (a typical fertilizer for flowers). The first number is the mass percent N; the second is the mass percent P₂O₅; the third is the mass percent K₂O. Thus, the active ingredients in a 5-10-5 product are equivalent to 5% N, 10% P₂O₅, and 5% K₂O, by weight. (The reporting of fertilizer ingredients in this way is a convention agreed on by fertilizer manufacturers.) What is the mass in pounds of each of these three elements (N, P, K) in a 100-lb bag of fertilizer?