Calculate the volume of oxygen obtained from 200 liters of air (take the volume fraction of oxygen in the air as 21%
| May 30, 2021 | education
Find the volume of oxygen in 100 liters of air.
100 l – 100%,
Xl – 21%,
X = (100 l × 21%): 100 = 21 l.
100 l (air) – 21 l (oxygen),
200 l (air) – x.
X = (200 l × 21 l): 100 l = 42 l.
Answer: 42 liters.
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