What is the empirical formula for phenobarbital c12h12n2o3

V1t2 = v2t1 is an expression of who’s law

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.

Which element is the least metallic between cadmium, silver, zinc, or iron?