Answer:
A
Explanation:
lies to the left of periodic table
It's classified as an acid
A model showing that gases are made from the matter of particles that are too small to see and are moving freely around in space can explain many observations.
There is no way to know which reaction requires which catalyst. However, if you apply copper to a reaction where it does act as a catalyst, the rate of reaction will be much faster as it lowers the activation energy for successful collisions.
