Question

chemical reaction
--a reaction that cannot be undone and makes a new type of matter.
rita made a chemical reaction and wrote down each step with some notes.
step 1
poured baking soda into an empty beaker.
step 2
poured vinegar into the beaker.
step 3
bubbles formed as the baking soda and vinegar mixed.
which step showed that there was a chemical reaction by giving off a gas?
step 1
step 3
step 2

Explanation:

Bubbles are a visible sign of gas release, which occurs when baking soda and vinegar react. This gas production confirms a chemical reaction, and this observation is noted in Step 3.

Answer:

Step 3