Question

the number of mole of oxygen in one litre of air containg 21% oxygen by volume under standard condition​

Answer 1

Answer:

Explanation

It is given that air contains 21% oxygen by volume

It means that

100ml air ---21ml oxygen

So

1000ml air ----210 ml oxygen

(1000ml = 1l)

The questions asks for no. Of moles in 1litre air

We have got 210ml of oxygen in 1l of air so accordingly

No of moles = volume(in ml)/22400

Hence -- 210/22400

=0.0093 moles

I hope it helps