Answer:

Explanation:
When acetic acid solution and barium hydroxide solution react together to give an aqueous solution of barium acetate and water
The balanced chemical reaction will be given by

the average speed is 23.4 km per hour cause it is total distance over total time equal to average speed
I believe the answer would be C, unbalanced.
Since the forces are in opposite directions, and aren't the same size, the answer would be unbalanced.
Stainless steel is an alloy of iron, chromium and nickel.
Answer:
The answer is B an open system allows energy and mass to move in and out of it
Hope it helps