Will mark brainliest! how is the atomic mass unit (amu) defined? a) 1/14 the mass of a nitrogen-14 atom b) 1/13 the mass of a carbon-13 atom c) 1/16 the mass of an oxygen-16 atom d) 1/12 the mass of a carbon-12 atom

An atomic mass unit is defined as precisely 1/12 the mass of an atom of carbon-12.

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).