How does the energy of an electron close to the nucleus compare to the energy of electrons farther away from the nucleus?

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.

Can someone me with 1 to 4 plz. fast

What is the mass of 0.46 mol of mgcl2