Answer:
7
Explanation:
The mass number is neutrons plus protons
The answer would be D. because when an acid and base mix the start to cancel each other out causing it to neutralize
Answer:

Explanation:

From the question, one can work out which states of matter to assign to which species. The trick with organic equations of this nature is to try to balance everything but oxygen first. Make sure you balance oxygen last because it is the easiest to balance.