The chemical and physical process that change things over time are called

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

•hydration •dissociation •dissolving which one goes to which