how do you do #4??
help please.
![how do you do 4 help please class=](https://us-static.z-dn.net/files/d8e/b488db82d5ea2e3923724047cda0bb1f.png)
Answer:
The third one
Explanation:
In all those equations except the third one the number of Na in the reactant side is not equal to the number of Na in the products side but in the third equation Na is 2 in both sides