Multiple choice

Carbon dioxide as compared to air is

  1. heavier

  2. lighter

  3. as heavy as air

  4. as light as air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon dioxide has a molar mass of 44 g/mol compared to air's average of 29 g/mol, making it about 1.5 times heavier than air. This is why CO2 settles in low-lying areas and can displace oxygen.

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