Which numbers should go in the blanks when this equation is balanced? _Pb (NO3) 2 + _NaCl->NaNO3+_PbCl2

Answer: First, you need a blank in front of NaCl or else you cannot balance this equation. However, if you do put a blank there:

1, 2, 2, 2

Explanation:

Here is the balanced equation

1 Pb (NO3) 2 + 2 NaCl-> 2 NaNO3 + 1 PbCl2