Relative atomic/molecular mass

Al₂O₃

_{[Al:27, O:16]}

MgCl

_{[Mg:24, Cl:35.5]}

NO₂

_{[N:14, O:16]}

CH₄

_{[C:12, H:1]}

Cu(OH)₂

_{[Cu:64, O:16, H:1]}

(NH₄)₂SO₄

_{[N:14, H:1, S:32, O:16]}

KNO₃

_{[K:39, N:14, O:16]}

CaO

_{[Ca:40, O:16]}

PbCO₃

_{[Pb:207, C:12, O:16]}

HCOOH

_{[H:1, C:12, O:16]}