Baking soda and vinegar are mixed together in a sealed plastic bag. The chemicals bubble and the bag expands. Which conclusion can be made from these observations? There was a chemical change, and a precipitate was formed.

B.
There was a chemical change, and a gas was produced.

C.
There was a physical change, and a precipitate was formed.

D.

The answer is C. There was a physical change, and a precipate was formed.

Explanation:

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.