Which of the following is a pure substance

a. chocolate
b. orange juice
c. seawater
d. hydrogen peroxide

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.

Tell me the iupac names of the following alcohols:

Salt in oceans comes from and of rocks