Cuál es una regla que podría hacerse para escribir una fórmula química ?

Both sides have to be equal

Explanation:

It just does

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

the answer is barium and copper bromide