Some Basic Concepts Of Chemistry Question 39

Question: The number of moles of oxygen in one litre of air containing 21% oxygen by volume, under standard conditions are

Options:

A) 0.0093 mole

B) 0.21 mole

C) 2.10 mole

D) 0.186 mole

Show Answer

Answer:

Correct Answer: A

Solution:

[a] 21% of 1 litre is 0.21 litre. 22.4 litres = 1 mole at STP
$ \therefore 0.21 $ litre $ =\frac{0.21}{22.4}=0.0093 $ mol



NCERT Chapter Video Solution

Dual Pane