A student was roasting marshmallows over a fire. The student noticed that the marshmallows turned brown, and they were
bubbling. Is this a chemical or physical change to matter? How do
you know? List two signs that you know what type of change it is.

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