Answer:
Substances 1 and 2
Explanation:
an element only has 1 kind of atoms :3
BaO, Barium Oxide.
Na2SO4, Sodium Sulfate.
CuO, Copper (II) Oxide.
P2O5, Diphosphorus Pentoxide.
HNO3, Nitric Acid.
CO32-, Molecular Formula.
Hope this helps. :)
Answer:
C15 H31 O4 S
Explanation:
molecular formula is also the same because the value of "n" is 1