The number of mole of nitrogen in one litre of air containing 10 % nitrogen by volume, under standard conditions, is

Question

The number of mole of nitrogen in one litre of air containing 10 % nitrogen by volume, under standard conditions, is (A) 0.03 mole (B) 2.10 moles (C) 0.186 mole (D) 4.46 × 10-3 mole

Tardigrade Admin · Accepted Answer

Volume of N 2 in 1 L i.e., 1000 ml of N 2=(10/1000) × 1000=100 ml 22400 ml at STP =1 mol. ∴ 100 ml at STP =(1/22400) × 100 =(1/224)=4.46 × 10-3 mol

Q. The number of mole of nitrogen in one litre of air containing $10%$ nitrogen by volume, under standard conditions, is

$0.03$ mole

$2.10$ moles

$0.186$ mole

$4.46 \times 1 0^{- 3}$ mole

Volume of $N_{2}$ in $1 L$ i.e., $1000 m l$ of
$N_{2} = \frac{10}{1000} \times 1000 = 100 m l$
$22400 m l$ at $STP = 1 m o l$ .
$∴ 100 m l$ at $STP = \frac{1}{22400} \times 100$
$= \frac{1}{224} = 4.46 \times 1 0^{- 3} m o l$

Q. The number of mole of nitrogen in one litre of air containing 10% nitrogen by volume, under standard conditions, is

0.03 mole

2.10 moles

0.186 mole

4.46×10−3 mole