Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?
O It will weigh more than 15 grams.
O It will have an increased density.
It will still weigh 15 grams.
O It will still have the same density.

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).

14 days is the half-life of phosphorus-32