Explanation:
overall preview would be an expirement is an empirical procedure that arbitrates competing models or hypothesis ☺️
Answer:1 mol of Mg(NO3)2 contains 6.022*10^23 molecules
3 mol Mg(NO3)2 contains 3*6.022*10^23 = 1.81*10^24 molecules
Each Mg(NO3)2 molecule contains 2 N atoms
Number of N atoms = 2*1.81*10^24 = 3.62*10^24 N atoms.
1.50x10^6 m2 is the answer you're looking for
