Which element on the periodic table is the lowest mass in period 4??

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.

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

Explanation for basic character?