In a reaction, compounds A and B combine to form compounds C and D. Experimental data shows that the rate law is: rate = k[A][B]3. What is the order of the reaction in A and B? A. first-order in A, third-order in B

B. fourth-order in A, fourth-order in B

C. second-order in A, second-order in B

D. k-order in A, third-order in B​

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 number of molecules present in 0.750 mol of mgo.

Give the orbital configuration of the phosphorus (p) atom.