A student drops a white tablet into a glass of water, producing carbon dioxide gas. This is a demonstration of
A. a change of state.
B. a chemical reaction.
C. the creation of matter.
O D. the movement of electricity.

A chemical reaction

Explanation:

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

2b2t

explanation:

2b2t