Answer:
The theoretical yield is calculated from the amount of the limiting reactant present.
a
Explanation:
There are 188.96 gm of moles in NaF
The balance reaction is
2Pb(NO3)2 ----》4NO2+2PbO+O2
hence the value of a,b,c,d are 2,4,2,1 respectively!
it's c.
hope this helps