The percent composition of an element in a compound can be found by the following formula:
Therefore, we must first find the weight of the lead(II) nitride molecule. The molecular formula of lead (Il) nitride is Pb3N2, so the molar mass of the element will be:
Molar Mass Pb3N2= Atomic Mass Pb x 3 + Atomic Mass N x 2
the values of the atomic mass of the elements are found in the periodic table.
Atomic Mass Pb=207.2u
Atomic Mass N=14.0067u
So, the molar mass of Pb3N2 will be:
The percent composition of nitrogen in Pb3N2 will be:
Answer: The percent composition of nitrogen in a compound of lead (Il) nitride is 4.31%