Answer: Li percentage in [tex]Li_3N[/tex] is 59.8%.
Explanation: The question asks to calculate the mass percentage of Li in [tex]Li_3N[/tex] .
The formula used for mass percentage of an element in a compound is:
mass percentage = [tex](\frac{element mass}{compound mass})*100[/tex]
Atomic mass of Li is 6.94 and atomic mass of N is 14.0.
There are three Li in the given compound. So, the mass of Li in the compound is = 3(6.94) = 20.82
Mass of compound = 20.82 + 14.0 = 34.82
Mass percentage of Li = [tex](\frac{20.82}{34.82})*100[/tex] = 59.8%
Hence, the percentage of Li in [tex]Li_3N[/tex] is 59.8%.
