Convert, using dimensional analysis, from 5.45 miles to cm (1 mi = 1.61 km)

What element breaks down into yttrium-90?

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 class of molecules functions as chemical signals? hormones water carbohydrates proteins