coefficient: they balance the chemical equation you have to make sure the number is as small as it can. It is also used to convert different compounds to compounds or quantities to quantities.
The answer to this question is False
Answer:
The mass number of an atom is its total number of protons and neutrons.
Explanation:
Nitrous oxide has 2 nitrogen atoms and 1 oxygen atom per molecule
2mg(s)+02(g)=2mg0 that was the correct answer
