Air contains 21% of oxygen by volume. The number of moles of O_(2) present in 5L of air at STP conditions

Air contains 21% of oxygen by volume. The number of moles of O_(2) pre

1.	Air contains 21% of oxygen by volume. The number of moles of O_(2) present in 5L of air at STP conditions
Answer» `2.23xx10^(-1)` `4.68xx10^(-4)` `4.68xx10^(-2)` `0.0234` ANSWER :C