In a endothermic reaction energy from an outside source is continuously being added.
I think it's just water right..?
Answer:
The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. ... Because electrons have virtually no mass, just about all the mass of an atom is in its protons and neutrons. Therefore, the total number of protons and neutrons in an atom determines its mass in atomic mass units (Table 4.5. 1).
Answer:
12
Explanation:
because that plot and the iron
