_Au2S3 + _H2---> _Au + _H2S Question 3 options:

A- 1, 3, 2, 3

B- 1, 2, 4, 2

C- 1,3,1,2

D- 2, 1, 1, 3

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).

the dependant variable is spilled water

the independent is the heat

the dissolution of polymer can be thermodynamically described in 2 steps.