Mr=2×Ar(O)cap M sub r equals 2 cross cap A sub r open paren cap O close paren Mr=2×15.999cap M sub r equals 2 cross 15.999 Mr=31.998cap M sub r equals 31.998 The relative molecular mass of O2cap O sub 2 is .
, multiply the atomic mass by the number of atoms in the molecule: mr-of-o2
The relative molecular mass ( Mrcap M sub r ) of oxygen gas ( O2cap O sub 2 ) is (often rounded to 32.0032.00 ). Licensed by Google 1. Identify Atomic Mass Mr=2×Ar(O)cap M sub r equals 2 cross cap