Assertion: tune | /r/UsedFor | number of molecules
Facets:
Source sentences:
text: Since nitrogen has an atomic mass of 14.01, and air has ~1% argon (39.95) and other trace gases, air is thus: 20.95% × 2 × 16.00 = 23.14% oxygen by mass 78.08% × 2 × 14.01 + 20.95% × 2 × 16.00 + 0.97% × 39.95 The mass percentage of oxygen in dry air is higher than the volume percentage because the oxygen molecule is heavier than the nitrogen molecules, etc. for a given volume (or number of molecules).