Air is an important inexhaustible natural resource. It is essential for the survival of human beings, … taken and the amount of…
Answers:
Nitrogen in air = 78%, oxygen = 21%, others = 1%
(i) Quantity of air = 800 m3
∴ Quantity of nitrogen in it = 800 of 78% = 800 × (78/100) m3 = 624 m3
Quantity of oxygen = 800 of 21% = 800 × (21/100) m3 = 168 m3
(ii) If the air contains 4200 litres of oxygen, then total quantity of air = (4200 × 100)/21 litres
= 200 × 100 litres = 20000 litres
And amount of nitrogen in it = 20000 of 78%
= 20000 × 78/100 = 15600 litres