The lack of a subscript after the 0 means that there is only one oxygen (0).
There are 2 hydrogen molecules and 1 oxygen molecules
hope this helps
It has to be used because you can not visually see them
Answer:
Option D
a new invention lowers the cost of production
Explanation:
When there is a new invention lowers the cost of production, the production is likely to increase since the time allocated is as previous. Therefore, the curve moves to the right, to indicate a positive direction
