, multiply the atomic mass by the number of atoms in the molecule:
To find the molecular mass, we first look at the periodic table for the ( Arcap A sub r ) of a single oxygen atom. Arcap A sub r of Oxygen ( ) is approximately 15.99915.999 . 2. Account for Molecular Subscript 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 , multiply the atomic mass by the number