If it's a cube you use this formula Edge to the 3rd power example if the edge of a cube is 6 you supposed to do 6 times 6 times 6 which is 216
Answer:
According to the equation below salt is produced by BaH2s
A chemical reaction is going to be your answer
The second one. Subscripts are always related to molecules, not atoms and only count the number of molecules of a single element unless in a form such as (CO3)2. In this case, there are 2 molecules of carbonate and 6 of oxygen
Let me know if you need further explanation
Hope this helps!