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The number of moles of oxygen in 1 L of ...

The number of moles of oxygen in 1 L of air containing `21%` oxygen by volume , under standard conditions , is

A

0.0093 mole

B

0.21 mole

C

2.10 mole

D

0.186 mole

Text Solution

Verified by Experts

The correct Answer is:
A
21% of 1 litre is `implies` 0.21 litre.
22.4 litres = 1 mole at STP
`:. "0.21 litre"=(0.21)/(22.4)=0.0093` mol
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