Which equation shows that mass is conserved in the chemical reaction? * a. N2 +2H2 → 3NH3
b. N2 +H2 → NH3
c. 3N2 +H2 → 2NH3
d. N2 +3H2 → 2NH3

Do u have the n? or maybe the m?

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this . 

The correct answer is b