Answer:
2
Explanation:
The unbalanced reaction is shown below as:-
\(Pb(NO_3)_2+NaCl\rightarrow PbCl_2+NaNO_3\)
On the left hand side,
There is 1 lead atom and 2 nitrogen atoms and 6 oxygen atoms and 1 sodium atom and 1 chlorine atom
On the right hand side,
There is 1 lead atom and 2 chlorine atoms and 3 oxygen atoms and 1 sodium atom
Thus,
Right side, \(NaNO_3\) must be multiplied by 2 so to balance nitrogen and oxygen.
Left side, \(NaCl\) is multiplied by 2 so to balance the whole reaction.
Thus, the balanced reaction is:-
\(Pb(NO_3)_2+2NaCl\rightarrow PbCl_2+2NaNO_3\)
Coefficient of the sodium chloride in the balanced equation - 2
