Which of these gases is lighter and which is heavier than air: O2, H2 or CO2
| November 30, 2020 | education
The molar mass of air is 29.
M (O2) = 16 × 2 = 32 (hence heavier than air)
M (H2) = 1 × 2 = 2 (hence lighter than air)
M (CO2) = 12 × 1 + 16 × 2 = 12 + 31 = 44 (hence heavier than air)
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