Answer:
9
Explanation:
mass number = protons + neutrons
= 4 + 5 = 9
Answer:
Energy and how it can change forms. Kinetic, potential, and chemical energy.
Use your periodic table to get 1 mol. Look up the atomic masses. I'll round the numbers since every periodic table is different.
N = 14
O2 = 2 *16
Total = 30 grams / mol
Therefore 2 mols = twice as much = 60 grams.