Which half reaction correctly represent oxidation? a)Fe → Fe²⁺ + 2e⁻
b)Fe²⁺ → Fe + 2e⁻
c)Fe + 2e⁻ → Fe²⁺
d)Fe²⁺ + 2e⁻ → Fe​

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.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?