Answer:
Answer is D. All of the above
3H2 + 3Cl2 —> 6HCl
As long as we have 3 in front of the compound so u have to multiple it by the number of the elements that are in the compound
We have 6 H
And 6Cl
So we need 6 HCl to balance the equation.
Hope that it helps
The molecules in gas are always trying to expand