contestada

What choice
demonstrates
the Law of
Conservation of Mass?
A. 56 g N₂+ 132 g O₂-216 g N₂Os
B. 216 g Ag+71 g Cl₂ → 245 g AgCl
C. 45 g Mn +32 g O2-87 g MnO2
D. 28 g N₂ +6g H₂ → 34 g NH3