Question

_Na+ Cl2 - -> _NaCl

A 2,4
B 1,2
C 3,3
D 2,2

Answer 1

D 2,2

Step-by-step explanation:

We can see that there are 2 chlorines on the reactant side so there has to be a 2 on the product side

Now we have Na + Cl2 --> 2NaCl

The problem now is that there are 2 sodiums on the product side so add a 2 to the Na on the reactant side

2Na + Cl2 --> 2NaCl

Now it's balanced!